Saturable Absorber (SAM)

Saturable Absorber (SAM)

Keywords: saturable absorber, SAM, mrror, ultrafast laser

STB Series Saturable Absorber Mirrors (SAM) Saturable absorber mirrors are Bragg-mirrors with AlAs/GaAs quarter-wave stacks, grown on GaAs wafers with one or more low temperature GaAs (LT-GaAs) or LT-InGaAs films as saturable absorbers. Our saturable

SAM

SAM

STB Series Saturable Absorber Mirrors (SAM)

Saturable absorber mirrors are Bragg-mirrors with AlAs/GaAs quarter-wave stacks, grown on GaAs wafers with one or more low temperature GaAs (LT-GaAs) or LT-InGaAs films as saturable absorbers.

Our saturable absorber mirrors with carrier relaxation times in the picosecond range can be used for passive mode-locking and Q-switching of diode-pumped lasers. The design of the thin film stack can be adjusted to meet the requirements of different passively mode-locked lasers in the picosecond and femtosecond region.

SAM SAM

STB-SAM order information: Part-No description: STB-SAM-λ-A-τ-x

• λ - laser wavelength
 • A - low intensity absorption
 • τ - absorber relaxation time
 • x - mounting condition (please see  mounting conditions)

Step 1Step 2Step 3
Part-No description: STB-SAM-λ-A-τ-x
Please select the main parameters from the tables below.
  • λ - Laser wavelength for example: 1550 nm

  • A - Low intensity absorption for example: 33 %

  • τ - Absorber relaxation time for example: 2 ps

Please select the mounting option.
For Example, if you have chosen x=4.0-25.4s-c, mounting is as follows:
  • Chip size: 4 mm

  • Heat sink diameter: 25.4 mm

  • Mounting type: soldered

  • Position: center

Example:   STB-SAM-1550-33-2ps-4.0-25.4s-c
  • Laser wavelength: 1550 nm

  • Absorption: 33 %

  • Relaxation time: 2 ps

  • Chip size: 4 mm x 4 mm

  • Soldered in the center of a gold plated Copper heat sink with 25.4 mm diameter

Product Ranges:

  • Wavelength region   790 nm ... 830 nm: 800 nm

  • Wavelength region   910 nm ... 990 nm:  920 nm | 940 nm | 980 nm

  • Wavelength region 1020 nm ... 1150 nm:  1040 nm | 1064 nm | 1100 nm

  • Wavelength region 1110 nm ... 1320 nm:  1150 nm | 1300 nm

  • Wavelength region 1320 nm ... 1460 nm:  1340 nm | 1420 nm

  • Wavelength region 1470 nm ... 1660 nm:  1510 nm | 1550 nm | 1645 nm

  • Wavelength region 1900 nm ... 2600 nm:  2000 nm | 2400 nm

  • Wavelength region 2700 nm ... 3200 nm:  2800 nm | 3000 nm

Part no.Wavelength range [nm]Absorptance  [%]Relaxation time [ps]Modulation depth DR [%]Saturation fluency μJ/cm2
STB-SAM-800-1-5ps-x780-820150.6
STB-SAM-800-4-5ps-x780-820251.52
STB-SAM-810-5-1ps-x785-830513
STB-SAM-810-6-1ps-x785-835613.5
STB-SAM-800-6-1ps-x780-820613.5
STB-SAM-800-7-1ps-x780-820714
STB-SAM-810-7-1ps-x790-840714
STB-SAM-800-10-1ps-x785-8201016
STB-SAM-810-10-1ps-x790-8301016
STB-SAM-830-10-1ps-x810-8451014
STB-SAM-800-32-1ps-x780-84032120
STB-SAM-920-30-0.5ps-30-x920300.51530
STB-SAM-920-45-0.5ps-30-x920300.52230
STB-SAM-920-30-1ps-15-x9204511815
STB-SAM-920-20-3ps-15-x92020315
STB-SAM-920-30-3ps-15-x92030315
STB-SAM-940-4-1ps-x940412.670
STB-SAM-940-5-1ps-x94051360
STB-SAM-940-6-1ps-x940613.550
STB-SAM-940-22-1ps-x9402211460
STB-SAM-940-47-2ps-x940472
STB-SAM-940-68-2ps-x940682
STB-SAM-980-3-1ps-x98031
STB-SAM-980-4-1ps-x98041
STB-SAM-980-12-500fs-x980120.5
STB-SAM-980-15-500fs-x980150.5
STB-SAM-980-50-500fs-x980500.5
STB-SAM-980-70-500fs-x980700.5
STB-SAM-1040-1-1ps-x104011
STB-SAM-1040-1.5-1ps-x10401.51
STB-SAM-1040-2-1ps-x104021
STB-SAM-1040-2.5-800fs-x10402.50.8
STB-SAM-1040-3-1ps-x104031
STB-SAM-1040-4-800fs-x104040.8
STB-SAM-1040-5-800fs-x104050.8
STB-SAM-1040-5-1ps-x104051
STB-SAM-1040-7-1ps-x104071
STB-SAM-1040-8-1ps-x104081
STB-SAM-1040-10-1ps-x1040101
STB-SAM-1040-15-500fs-x1040150.5
STB-SAM-1040-27-1ps-x1040271
STB-SAM-1030-30-1ps-x1030301
STB-SAM-1030-32-1ps-x1030321
STB-SAM-1040-43-1ps-x1040431
STB-SAM-1030-44-1ps-x1030441
STB-SAM-1040-48-1ps-x1040481
STB-SAM-1030-54-1ps-x1030541
STB-SAM-1040-54-1ps-x1040541
STB-SAM-1030-55-500fs-x1030550.5
STB-SAM-1040-56-700fs-x1040560.7
STB-SAM-1040-60-1ps-x1040601
STB-SAM-1040-2.5-2ps-x10402.52
STB-SAM-1030-2.5-5ps-x10302.55
STB-SAM-1030-3-2ps-x103032
STB-SAM-1030-3.5-5ps-x10303.55
STB-SAM-1040-4-5ps-x104045
STB-SAM-1040-10-3ps-x1040103
STB-SAM-1040-10-5ps-x1040105
STB-SAM-1040-20-2ps-x1040202
STB-SAM-1040-28-3ps-x1040283
STB-SAM-1030-30-2ps-x1030302
STB-SAM-1040-30-3ps1040303
STB-SAM-1030-32-2ps1030322
STB-SAM-1030-32-3ps1030323
STB-SAM-1040-32-5ps1040325
STB-SAM-1040-33-5ps1040335
STB-SAM-1040-35-3ps1040353
STB-SAM-1030-38-2ps1030382
STB-SAM-1030-50-3ps1030503
STB-SAM-1040-52-2ps1040522
STB-SAM-1040-53-5ps1040535
STB-SAM-1040-54-4ps1040544
STB-SAM-1030-57-3ps1030573
STB-SAM-1040-65-2ps1040652
STB-SAM-1040-1-10ps-x1040110
STB-SAM-1040-1.5-10ps-x10401.510
STB-SAM-1040-2-10ps-x1040210
STB-SAM-1040-2.5-10ps-x10402.510
STB-SAM-1040-3.5-6ps-x10403.56
STB-SAM-1040-5-6ps-x104056
STB-SAM-1040-6-14ps-x1040614
STB-SAM-1040-18-10ps-x10401810
STB-SAM-1040-30-8ps-x1040308
STB-SAM-1040-32-9ps-x1040329
STB-SAM-1040-35-9ps-x1040359
STB-SAM-1040-40-9ps-x1040409
STB-SAM-1040-43-8ps-x1040438
STB-SAM-1040-50-12ps-x10405012
STB-SAM-1030-18-18ps-x10301818
STB-SAM-1040-21-35ps-x10402135
STB-SAM-1040-30-25ps-x10403025
STB-SAM-1040-40-25ps-x10404025
STB-SAM-1064-0.7-1ps-x10640.71
STB-SAM-1064-1.5-1ps-x10641.51
STB-SAM-1064-2-1ps-x106421
STB-SAM-1064-3-1ps-x106431
STB-SAM-1064-3.5-1ps-x10643.51
STB-SAM-1064-4-1ps-x106441
STB-SAM-1064-5-1ps-x106451
STB-SAM-1064-6-1ps-x106461
STB-SAM-1064-10-1ps-x1064101
STB-SAM-1064-13-500fs-x1064130.5
STB-SAM-1064-18-500fs-x1064180.5
STB-SAM-1064-26-1ps-x1064261
STB-SAM-1064-38-1ps-x1064381
STB-SAM-1064-70-500fs-x1064700.5
STB-SAM-1064-1-5ps-x106415
STB-SAM-1064-3-5ps-x106435
STB-SAM-1064-5-3ps-x106453
STB-SAM-1064-10-5ps-x1064105
STB-SAM-1064-12-5ps-x1064125
STB-SAM-1064-14-2ps-x1064142
STB-SAM-1064-18-5ps-x1064185
STB-SAM-1064-19-4ps-x1064194
STB-SAM-1064-21-3ps-x1064213
STB-SAM-1064-28-4ps-x1064284
STB-SAM-1064-30-2ps-x1064302
STB-SAM-1064-32-3ps-x1064323
STB-SAM-1064-40-3ps-x1064403
STB-SAM-1064-48-4ps-x1064484
STB-SAM-1064-50-5ps-x1064505
STB-SAM-1064-57-4ps-x1064574
STB-SAM-1064-60-4ps-x1064604
STB-SAM-1064-70-3ps-x1064703
STB-SAM-1064-0.6-10ps-x10640.610
STB-SAM-1064-1-10ps-x1064110
STB-SAM-1064-2-10ps-x1064210
STB-SAM-1064-3-10ps-x1064310
STB-SAM-1064-4-10ps-x1064410
STB-SAM-1064-4-15ps-x1064415
STB-SAM-1064-5-9ps-x106459
STB-SAM-1064-6-10ps-x1064610
STB-SAM-1064-8-14ps-x1064814
STB-SAM-1064-12-16ps-x10641216
STB-SAM-1064-19-10ps-x10641910
STB-SAM-1064-22-6ps-x1064226
STB-SAM-1064-28-15ps-x10642815
STB-SAM-1064-30-8ps-x1064308
STB-SAM-1064-39-6ps-x1064396
STB-SAM-1064-40-9ps-x1064409
STB-SAM-1064-50-10ps-x10645010
STB-SAM-1064-50-12ps-x10645012
STB-SAM-1064-55-10ps-x10645510
STB-SAM-1064-65-10ps-x10646510
STB-SAM-1064-3-25ps-x1064325
STB-SAM-1064-5-25ps-x1064525
STB-SAM-1064-8-25ps-x1064825
STB-SAM-1064-15-30ps-x10641530
STB-SAM-1064-17-25ps-x10641725
STB-SAM-1064-20-30ps-x10642030
STB-SAM-1064-25-25ps-x10642525
STB-SAM-1064-26-35ps-x10642635
STB-SAM-1064-28-25ps-x10642825
STB-SAM-1064-30-25ps-x10643025
STB-SAM-1064-33-30ps-x10643330
STB-SAM-1064-36-45ps-x10643645
STB-SAM-1064-9-47ps-x1064947
STB-SAM-1064-10-47ps-x10641047
STB-SAM-1064-14-240ps-x106414240
STB-SAM-1064-22-47ps-x10642247
STB-SAM-1100-30-500fs-x1100300.5
STB-SAM-1100-50-500fs-x1100500.5
STB-SAM-1100-70-500fs-x1100700.5
STB-SAM-1100-90-500fs-x1100900.5
STB-SAM-1150-3-500fs-x115030.5
STB-SAM-1150-4-500fs-x115040.5
STB-SAM-1150-6-500fs-x115060.5
STB-SAM-1150-28-1ps-x1150281
STB-SAM-1150-32-1ps-x1150321
STB-SAM-1300-4-10ps-x1300410
STB-SAM-1300-7-10ps-x1300710
STB-SAM-1300-8-10ps-x1300810
STB-SAM-1300-10-10ps-x13001010
STB-SAM-1300-12-10ps-x13001210
STB-SAM-1340-1-1ps-x134011
STB-SAM-1340-2-1ps-x134021
STB-SAM-1340-3-1ps-x134031
STB-SAM-1340-7-1ps-x134071
STB-SAM-1340-15-1ps-x1340151
STB-SAM-1420-1-10ps-x1420110
STB-SAM-1420-4-10ps-x1420410
STB-SAM-1510-4-10ps-x1510410
STB-SAM-1510-6-10ps-x1510610
STB-SAM-1510-15-2ps-x1510152
STB-SAM-1510-18-2ps-x1510182
STB-SAM-1510-23-2ps-x1510232
STB-SAM-1550-3-4ps-x155034
STB-SAM-1550-4-4ps-x155044
STB-SAM-1550-10-5ps-x1550105
STB-SAM-1550-12-2ps-x1550122
STB-SAM-1550-12-5ps-x1550125
STB-SAM-1550-14-5ps-x1550145
STB-SAM-1550-16-2ps-x1550162
STB-SAM-1550-17-1.5ps-x1550171.5
STB-SAM-1550-17-2ps-x1550172
STB-SAM-1550-17-4ps-x1550174
STB-SAM-1550-18-2ps-x1550182
STB-SAM-1550-20-3ps-x1550203
STB-SAM-1550-20-4ps-x1550204
STB-SAM-1550-21-2ps-x1550212
STB-SAM-1550-22-2ps-x1550222
STB-SAM-1550-23-2ps-x1550232
STB-SAM-1550-25-5ps-x1550255
STB-SAM-1550-26-2ps-x1550262
STB-SAM-1550-26-5ps-x1550265
STB-SAM-1550-27-2ps-x1550272
STB-SAM-1550-32-4ps-x1550324
STB-SAM-1550-33-2ps-x1550332
STB-SAM-1550-40-2ps-x1550402
STB-SAM-1550-41-1.5ps-x1550411.5
STB-SAM-1550-55-2ps-x1550552
STB-SAM-1550-7-10ps-x1550710
STB-SAM-1550-11-18ps-x15501118
STB-SAM-1550-15-7ps-x1550157
STB-SAM-1550-15-12ps-x15501512
STB-SAM-1550-17-10ps-x15501710
STB-SAM-1550-20-10ps-x15502010
STB-SAM-1550-20-12ps-x15502012
STB-SAM-1550-22-5ps-x1550225
STB-SAM-1550-22-12ps-x15502212
STB-SAM-1550-25-18ps-x15502518
STB-SAM-1550-28-12ps-x15502812
STB-SAM-1550-30-5ps-x1550305
STB-SAM-1550-32-18ps-x15503218
STB-SAM-1550-40-10ps-x15504010
STB-SAM-1550-42-12ps-x15504212
STB-SAM-1550-50-10ps-x15505010
STB-SAM-1645-2-2ps-x164522
STB-SAM-1645-4-2ps-x164542
STB-SAM-1645-5-2ps-x164552
STB-SAM-1645-8-2ps-x164582
STB-SAM-1645-32-2ps-x1645322
STB-SAM-1645-50-2ps-x1645502
STB-SAM-1920-2-30ps-x1920230
STB-SAM-1920-4-40ps-x1920440
STB-SAM-1920-7-10ps-x1920710
STB-SAM-1920-8-10ps-x1920810
STB-SAM-1920-18-15ps-x19201815
STB-SAM-1920-36-10ps-x19203610
STB-SAM-1960-3-10ps-x1960310
STB-SAM-1960-4-10ps-x1960410
STB-SAM-1960-5-10ps-x1960510
STB-SAM-1960-8-10ps-x1960810
STB-SAM-1960-13-10ps-x19601310
STB-SAM-1960-15-10ps-x19601510
STB-SAM-1960-18-10ps-x19601810
STB-SAM-1960-30-10ps-x19603010
STB-SAM-1960-54-10ps-x19605410
STB-SAM-2000-2-10ps-x1960210
STB-SAM-2000-13-10ps-x20001310
STB-SAM-2000-20-10ps-x20002010
STB-SAM-2000-22-10ps-x20002210
STB-SAM-2000-30-10ps-x20003010
STB-SAM-2000-36-10ps-x20003610
STB-SAM-2000-43-10ps-x20004310
STB-SAM-2400-1-10ps-x2400110
STB-SAM-2400-1.5-10ps-x24001.510
STB-SAM-2800-14-10ps-x28001410
STB-SAM-2800-20-10ps-x28002010
STB-SAM-2800-34-10ps-x28003410
STB-SAM-2900-9-10ps-x2900910
STB-SAM-3000-33-10ps-x29003310

Mounting conditions

x = 4.0-0

  • Single chip, unmounted

  • Chip area 4.0 mm x 4.0 mm

  • Chip thickness 450 µm

x = 1.0b-0

  • Batch of 4 unmounted chips

  • Chip area 1.0 mm x 1.0 mm

  • Chip thickness 450 µm

x = 1.3b-0

  • Batch of 4 unmounted chips

  • Chip area 1.3 mm x 1.3 mm

  • Chip thickness 450 µm

x = 4.0-12.7g-c / 4.0-12.7g-e

  • Chip area 4.0 mm x 4.0 mm

  • Glued on a copper heat sink with 12.7 mm diameter

  • Center mounted : x = 4.0-12.7g-c

  • Edge mounted : x = 4.0-12.7g-e

x = 4.0-12.7s-c / 4.0-12.7s-e

  • Chip area 4.0 mm x 4.0 mm

  • Soldered on a copper heat sink with 12.7 mm diameter

  • Center mounted : x = 4.0-12.7s-c

  • Edge mounted : x = 4.0-12.7s-e

x = 4.0-25.0g-c / 4.0-25.0g-e

  • Chip area 4.0 mm x 4.0 mm

  • Glued on a copper heat sink with 25.0 mm diameter

  • Center mounted : x = 4.0-25.0g-c

  • Edge mounted : x = 4.0-25.0g-e

x = 4.0-25.0s-c / 4.0-25.0s-e

  • Chip area 4.0 mm x 4.0 mm

  • Soldered on a copper heat sink with 25.0 mm diameter

  • Center mounted : x = 4.0-25.0s-c

  • Edge mounted : x = 4.0-25.0s-e

x = 4.0-25.4g-c / 4.0-25.4g-e

  • Chip area 4.0 mm x 4.0 mm

  • Glued on a copper heat sink with 25.4 mm diameter

  • Center mounted : x = 4.0-25.4g-c

  • Edge mounted : x = 4.0-25.4g-e

x = 4.0-25.4s-c / 4.0-25.4s-e

  • Chip area 4.0 mm x 4.0 mm

  • Soldered on a copper heat sink with 25.4 mm diameter

  • Center mounted : x = 4.0-25.4s-c

  • Edge mounted : x = 4.0-25.4s-e

x = 4.0-25.0w-c / 4.0-25.0w-e

  • Chip area 4.0 mm x 4.0 mm

  • Soldered on a water cooled copper heat sink with 25.0 mm diameter

  • Center mounted : x = 4.0-25.0w-c

  • Edge mounted : x = 4.0-25.0w-e

x = 4.0-25.0h-c / 4.0-25.0h-e

  • Chip area 4.0 mm x 4.0 mm

  • Thin film soldered on a water cooled copper heat sink with 25.0 mm diameter for high power application.

  • Center mounted : x = 4.0-25.0h-c

  • Edge mounted : x = 4.0-25.0h-e

x = FC/(A)PC-SMF

  • Mounted on a 1 m long single mode fiber.

  • Available fibers: 780HP

  • FC/PC connector: x = FC/PC-SMF

  • FC/APC connector: x = FC/APC-SMF

x = FC/(A)PC-PMF

  • Mounted on a 1 m long polarization maintaining fiber.

  • Available fibers: Panda PM780-HP

  • FC/PC connector: x = FC/PC-PMF

  • FC/APC connector: x = FC/APC-PMF

STB Series Resonant Saturable Absorber Mirrors

The resonant saturable absorber mirror (RSAM) is designated to reshape an optical signal. An optical signal which propagates in optical fibers, communication nodes and other optical devices is subject to optical losses and is modified. After every amplification stage, which uses the stimulated optical emission process, the signal to noise ratio decreases as a result of the inevitable spontaneous emission.

SAM

The RSAM, included after an optical amplifier, decreases the noise floor and allows to pass the optical pulses unaffected due to the nonlinear-optical behavior.

Part-No description: RSAM-λ-τ-x

  • λ - laser wavelength

  • τ - absorber relaxation time

  • x - mounting condition

Part no.Wavelength range [nm]Low intensity reflectivity R0 [%]Absorptance A0 [%]Relaxation time [ps]Non-saturable loss [%]
STB-RSAM-980-x975-984199140
STB-RSAM-1030-1ps-x1030199145
STB-RSAM-1060-32ps-x1056-10642983240
STB-RSAM-1064-9ps-x1050-1064199940
STB-RSAM-1550-10ps-x15502981040
STB-RSAM-1560-100ps-x156059510025

STB Series Saturable Output Couplers (SOC)

Using a saturable output coupler (SOC), a self-starting, passively mode-locked or Q-switched diode-pumped solid-state or fiber laser with a very simple layout can be arranged. The SOC is a combination of a saturable absorber mirror (SAM) with an output coupler.

SAM

SOC order information: Part-No description: STB-SOC-λ-A-T-τ-x

  • λ - laser wavelength

  • A - low intensity absorption

  • T - low intensity transmittance

  • τ - absorber relaxation time

  • x - mounting condition

Part numberWavelength nmAbsorptance %Transmittance %Reflectance %Modulation depth %Non-saturable loss %
STB-SOC-1040-2-3-1ps-x104023951.20.8
STB-SOC-1040-3-0.4-1ps-x104030.4961.81.2
STB-SOC-1040-3-4-1ps-x104034931.81.2
STB-SOC-1040-5-5-1ps-x1040559032
STB-SOC-1040-6-0.5-1ps-x104060.5933.51.5
STB-SOC-1040-6-2-1ps-x104062923.52.5
STB-SOC-1040-7-2-1ps-x1040729143
STB-SOC-1040-8-0.6-1ps-x104080.69153
STB-SOC-1040-8-6-15ps-x104086844.53.2
STB-SOC-1040-9-9-1ps-x1040998254
STB-SOC-1040-11-3-1ps-x10401138665
STB-SOC-1040-14-10-15ps-x10401410767.55.5
STB-SOC-1040-17-5-1ps-x104017578107
STB-SOC-1040-24-19-15ps-x10402219589.59
STB-SOC-1064-1-1-5ps-x106411980.6
STB-SOC-1064-1.8-2.2-1ps-x10641.82.2961.10.7
STB-SOC-1064-2-0.3-1ps-x106420.3971.20.8
STB-SOC-1064-2.7-3.2-1ps-x10642.73.2931.71.0
STB-SOC-1064-4-0.5-1ps-x106440.5952.81.2
STB-SOC-1064-7-0.7-1ps-x106470.79243
STB-SOC-1064-8-6-1ps-x1064868644
STB-SOC-1064-8-8-15ps-x106488844.53
STB-SOC-1064-9-13-17ps-x10649137865
STB-SOC-1064-13-12-15ps-x10641312766.55
STB-SOC-1064-15-23-17ps-x106415236287
STB-SOC-1064-21-13-20ps-x106421136613
STB-SOC-1064-22-19-15ps-x10642219589.59
STB-SOC-2000-26-19-10ps-x20002619551511
STB-SOC-2000-26-24-10ps-x-thin20002624501511
STB-SOC-2000-40-28-10ps-x20004028322317

Saturable Noise Suppressor (SANOS)

The resonant saturable absorber mirror (RSAM) is designated to reshape an optical signal. An optical signal which propagates in optical fibers, communication nodes and other optical devices is subject to optical losses and is modified. After every amplification stage, which uses the stimulated optical emission process, the signal to noise ratio decreases as a result of the inevitable spontaneous emission.

SAM

The RSAM, included after an optical amplifier, decreases the noise floor and allows to pass the optical pulses unaffected due to the nonlinear-optical behavior.

1. Free-space Saturable Noise Suppressor

For 1064 nm wavelength we offer a free-space saturable noise suppressor: FS-SANOS. It consists of a RSAM and a 100% mirror and allows the insertion into a laser beam without change of the beam direction.

Free space SANOS order information: Part-No description: STB-FS-SANOS-λ-τ-x

  • λ - laser wavelength

  • τ - absorber relaxation time

  • x - number of absorber stages (1 or 2)

SANOS applications

  • Suppression of noise (ASE – amplified spontaneous emission) after an optical amplifier

  • Suppression of remaining pulses after a pulse picker

1.1 Free-space SANOS @ 1064 nm with One RSAM

One stage STB-FS-SANOS-1064-15ps-1

A STB-FS-SANOS consists of a resonant saturable absorber mirror (RSAM) and a conventional 100% mirror. The beam goes true the FS-SANOS without changing of the direction, but with a parallel offset of 2 mm. The RSAM has a strong non-linear reflectance. For a low input signal level the transmittance of the STB-FS-SANOS is only 2 % (98 % loss), whereas high intensity pulses are transmitted with a lower loss of 50 %. The input is isolated better than 50 dB. To meet exactly the low-intensity reflectance minimum the input beam inclination can be changed by some degrees.

SAM

Main STB-FS-SANOS data:

  • Resonance wavelength: 1064 nm ( 1050 nm – 1064 nm on request)

  • Full width at half maximum FWHM: 20 nm

  • Noise suppression ratio: 14 dB

  • Insertion loss: 3 dB

  • Saturation fluence:  4 μJ/cm2 @ noise suppression of 10 dB

  • Relaxation time constant: 15 ps

  • Parallel beam offset: 2 mm

  • Mirrors: one RSAM and one dielectric mirror with R > 99%, size: 4 mm x 4 mm

  • Angle of incidence on mirrors: 8°

1.2 Two stage STB-FS-SANOS-1064-9ps-2

A STB-FS-SANOS-2 consists of two resonant saturable absorber mirrors (RSAM). The beam goes true the free-space SANOS without changing of the direction, but with a parallel offset of 2 mm. The RSAM has a strong non-linear reflectance. For a low input signal level the transmittance of the STB-FS-SANOS-2 is lower than 0,1% (99,9 % loss), whereas high intensity pulses are transmitted with a lower loss of 75 %. The input is isolated better than 50 dB. To meet exactly the low-intensity reflectance minimum the input beam inclination can be changed by some degrees.

Main FS-SANOS data

  • Resonance wavelength: 1064 nm

  • Full width at half maximum FWHM: 17 nm

  • Noise suppression ratio: > 20 dB

  • Insertion loss: 6 dB

  • Saturation fluence : 10 μJ/cm2 @ noise suppression of 20 dB

  • Relaxation time constant: 15 ps

  • Parallel beam offset: 2 mm

  • Mirrors: two RSAM, size: 4 mm x 4 mm

  • Angle of incidence on mirrors: 8°

2. Fiber-coupled Saturable Noise Suppressor

For 1550 nm wavelength we offer a fiber coupled saturable noise suppressor: FC-SANOS. It consists of a RSAM on the second port of a three port circulator and allows simple insertion into a fiber.

SAM

Fiber coupled SANOS order information: Part-No description: STB-FC-SANOS-λ-x

  • λ - laser wavelength

  • x - fiber and connector type

A SANOS is a resonant saturable absorber mirror (RSAM), mounted on a circulator. The RSAM has a strong non-linear reflectance. For a low input signal level the transmittance of the FC-SANOS is only 3% (97% loss), whereas high intensity pulses are transmitted with a lower loss of 50%. The needed peak pulse power for saturation is about 500 mW. Because the RSAM is a resonant device, the noise is only suppressed at the resonance wavelength. The common fiber connector type is FC/PC, but it can be customized. The input isolation is better than 50 dB.

  • Part number: STB-FC-SANOS-15XX

  • Resonance wavelength: 1530 nm, 1535 nm, … ,1555 nm, 1560 nm in steps of 5 nm

  • Full width at half maximum FWHM: 16 nm

  • Low intensity transmittance: 3 %

  • High intensity transmittance: 45 %

  • Noise suppression factor: 6 … 18 (dependent on the input signal/noise ratio)

  • Insertion loss: 3 dB

  • Pulse fluence: F = 100 μJ/cm2

  • Relaxation time constant : ~ 5 ps

  • Maximum mean input power:  0.5 W

  • Directivity: 50 dB

  • Fiber connector type: FC/PC, other on request

Saturable Absorber in Transmission (SA)

The saturable absorber without a Bragg-mirror can be used for self-starting, passively mode-locking of a laser in a similar way as a SAM, but it is working in transmission mode. It can be inserted for instance into a fiber ring laser. The saturatioon fluence of a SA is substantial higher than that of a SAM.

SAM

SA order information: Part-No description: STB-SA-λ-A-τ-x

  • λ - laser wavelength

  • A - low intensity absorption

  • τ - absorber relaxation time

  • x - mounting condition

1. Part number: STB-SA-1020-40-x at wavelength 1020 nm

  • Laser wavelength:  980 nm … 1040 nm

  • Absorptance:  40 %

  • Modulation depth: 25 %

  • Non-saturable loss: 15 %

  • Saturation fluence: 300 μJ/cm2

  • Pulse damage threshold: 1.2 mJ/cm2

  • Relaxation time constant:  ~ 500 fs

  • Chip area: 5mm x 5mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

2. Part number: STB-SA-1030-34-3ps-x at wavelength 1030nm

  • Laser wavelength: 1000 nm … 1040 nm

  • Absorptance: 34 %

  • Modulation depth: 20 %

  • Non-saturable loss: 14 %

  • Saturation fluence: 300 μJ/cm2

  • Pulse damage threshold: 1.2 mJ/cm2

  • Relaxation time constant: ~ 3 ps

  • Chip area: 5mm x 5mm; other dimensions on request

  • Chip thickness: 450 μm; semi-insulating GaAs

3. Part number: STB-SA-1064-14-28ps-x at wavelength 1064 nm

  • Laser wavelength: 1000 nm … 1100 nm

  • Absorptance: 14 %

  • Transmittance: 85 %

  • Modulation depth: 3.4 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold :  200 MW/cm2

  • Relaxation time constant: ~ 28 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

4. Part number STB-SA-1064-25-500fs-x at wavelength 1064 nm

  • Laser wavelength:1050 nm … 1090 nm

  • Absorptance : 25 %

  • Modulation depth: 13 %

  • Non-saturable loss: 12 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.2 mJ/cm2

  • Relaxation time constant:  ~ 500 fs

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

5. Part number STB-SA-1064-26-37ps-x at wavelength 1064 nm

  • Laser wavelength: 1000 nm … 1100 nm

  • Absorptance: 26 %

  • Transmittance: 73 %

  • Modulation depth: 4.9 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1 mJ/cm2

  • Relaxation time constant: ~ 37 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

6. Part number STB-SA-1064-40-500fs-x at wavelength 1064 nm

  • Laser wavelength: 1030 nm … 1090 nm

  • Absorptance: 40 %

  • Modulation depth: 25 %

  • Non-saturable loss: 15 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1 mJ/cm2

  • Relaxation time constant: ~ 500 fs

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

7. Part number STB-SA-1340-22-20ps-x at wavelength 1340 nm

  • Laser wavelength: 1340 nm

  • Absorptance: 22 %

  • Modulation depth: 14 %

  • Non-saturable loss: 8 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.2 mJ/cm2

  • Relaxation time constant: ~ 20 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

8. Product list STB-SA, λ = 1550 nm, 625 µm substrate thickness for free space application

(1) Part number STB-SA-1550-6-20ps-x at wavelength 1550nm

  • Laser wavelength: 1550 nm

  • Absorptance : 6 %

  • Modulation depth: 4 %

  • Non-saturable loss: 2 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold : 1.5 mJ/cm2

  • Relaxation time constant: ~ 20 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

(2) Part number STB-SA-1550-35-2ps-x at wavelength 1550 nm

  • Laser wavelength: 1400 nm … 1600 nm

  • Absorptance: 35 %

  • Modulation depth: 21 %

  • Non-saturable loss: 14 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.5 mJ/cm2

  • Relaxation time constant: ~ 2 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

(3) Part number STB-SA-1550-46-2ps-x at wavelength 1550 nm

  • Laser wavelength: 1400 nm … 1600 nm

  • Absorptance: 46 %

  • Modulation depth:  28 %

  • Non-saturable loss: 18 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.5 mJ/cm2

  • Relaxation time constant: ~ 2 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

9. Product list STB-SA, λ = 1550 nm, 150 µm substrate thickness for fiber butt coupling

(1) Part number STB-SA-1550-25-2ps-x at wavelength 1550 nm

  • Laser wavelength: 1500 nm … 1600 nm

  • Absorptance: 25 %

  • Modulation depth: 15 %

  • Non-saturable loss: 10 %

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 2 mJ/cm2

  • Relaxation time constant: ~ 2 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 100 μm; semi-insulating GaAs

(2) Part number STB-SA-1550-41-2ps-thin-x at wavelength 1550 nm, thin saturable absorber for fiber coupling

  • Laser wavelength: 1400 nm … 1600 nm

  • Absorptance: 41 %

  • Modulation depth:  25 %

  • Non-saturable loss: 16 %

  • Fiber coupling insertion loss: ≤ 1.6 dB

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.5 mJ/cm2

  • Relaxation time constant: ~ 2 ps

  • Chip area: 1.3 mm x 1.3 mm; other dimensions on request

  • Chip thickness: 150 μm; semi-insulating GaAs

(3) Part number STB-SA-1550-58-2ps-thin-x at wavelength 1550 nm, thin saturable absorber for fiber coupling

  • Laser wavelength: 1400 nm … 1600 nm

  • Absorptance: 58 %

  • Modulation depth:  35%

  • Non-saturable loss: 23 %

  • Fiber coupling insertion loss:  ≤ 1.6 dB

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 1.5 mJ/cm2

  • Relaxation time constant: ~ 2 ps

  • Chip area: 1.3 mm x 1.3 mm; other dimensions on request

  • Chip thickness: 150 μm; semi-insulating GaAs

10. Product list STB-SA, λ = 2000 nm

(1) Part number STB-SA-2000-1-x at wavelength 2000 nm

  • Laser wavelength: 1900 nm … 2100 nm

  • Absorptance: 1 %

  • Modulation depth:  0.6 %

  • Non-saturable loss:  0.4 %

  • Saturation fluence:  300 μJ/cm2

  • Damage threshold:  3 mJ/cm2

  • Relaxation time constant:  ~ 10 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm; semi-insulating GaAs

(2) Part number STB-SA-2000-25-10ps-x at wavelength 2000 nm

  • Laser wavelength: 1800 nm … 2200 nm

  • Absorptance: 25 % @ 2000 nm

  • Transmittance: 74 % @ 2000 nm

  • Reflectance: 1 % @ 2000 nm

  • Modulation depth: 15 % @ 2000 nm

  • Non-saturable loss: 11 % @ 2000 nm

  • Saturation fluence: 2 mJ/cm2

  • Damage threshold: 4 mJ/cm2

  • Relaxation time constant: ~ 10 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 180 μm; semi-insulating GaAs

(3) Part number STB-SA-2000-43-x at wavelength 2000 nm

  • Laser wavelength: 1800 nm … 2200 nm

  • Absorptance: 43 % @ 2000 nm

  • Transmittance: 56 % @ 2000 nm

  • Reflectance: 0.2 % @ 2000 nm

  • Modulation depth: 23 % @ 2000 nm

  • Non-saturable loss: 20 % @ 2000 nm

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 2 mJ/cm2

  • Relaxation time constant: ~ 10 ps

  • Chip area: 5.0 mm x 5.0 mm; other dimensions on request

  • Chip thickness: 625 μm or 150 μm for fiber butt coupling ; semi-insulating GaAs

11. Part number STB-SA-2800-10-10ps-x at wavelength 2800 nm

  • Laser wavelength: 2500 nm … 3000 nm

  • Absorptance: 10 % @ 2.8 μm

  • Transmittance: 90 % @ 2.8 μm

  • Reflectance: 0 % @ 2.8 μm

  • Modulation depth: 6 % @ 2.8 μm

  • Non-saturable loss: 4 % @ 2.8 μm

  • Saturation fluence: 300 μJ/cm2

  • Damage threshold: 2 mJ/cm2

  • Relaxation time constant: ~ 10 ps

  • Chip area: 5 mm x 5 mm; other dimensions on request

  • Chip thickness: 625 μm semi-insulating GaAs

RSA - Resonant Saturable Absorber in Transmission

The resonant saturable absorber can be used for passively mode-locking of a ring laser in a similar way as a SA. But it is a resonant device with the following special characteristics:

  • Zero reflectance at the resonance wavelength for low intensity.

  • Zero transmittance for all wavelengths outside the resonance.

  • At the resonance wavelength increasing transmittance with increasing pulse fluence.

  • The saturation fluence is substantial lower than that of a SA and even lower than that of a typical SAM.

The above mentioned characteristics allow the construction of a passively mode locked fiber ring laser with

  • a laser wavelength fixed at the resonance wavelength of the RSA,

  • and low power threshold for start of cw mode-locking.

RSA order information: Part-No description: STB-RSA-λ-A-T-τ-x

SAM

  • λ - laser wavelength

  • A - low intensity absorption

  • T - low intensity transmission

  • τ - absorber relaxation time

  • x - mounting condition

Part number STB-RSA-1057-53-45-6ps-x at wavelength 1057 nm

  • Resonance wavelength: 1056..1060 nm

  • Absorptance: 53 %

  • Transmittance: 45 %

  • Reflectance: 2 %

  • Modulation depth: △T = 27 %, △R = 15 %, △A = 43 %

  • Saturation fluence: 25 μJ/cm2

  • Damage threshold: 2 mJ/cm2

  • Relaxation time constant: 6 ps

  • Chip area: 5 mm x 5 mm; other dimensions on request

  • Chip thickness: 450 μm; semi-insulating GaAs

  • Front side protection: dielectric coating

  • Back side coating: the SA back side is polished and antireflection coated for 1060 nm

Mounting option x denotes the type of mounting as follows:

  • x = 5.0-0 unmounted chip 5.0 mm x 5.0 mm

  • x = 5.0-12.7 g glued on a copper heat sink with 12.7 mm diameter with 4 mm hole

  • x = 5.0-25.0 g glued on a copper heat sink with 25.4 mm diameter with 4 mm hole

  • x = 5.0-25.4 g glued on a copper heat sink with 25.4 mm diameter with 4 mm hole

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