OCT Parts & Systems

  • Update:Mar 13, 2020
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An optical isolator is an optical component which allows the transmission of light in only one direction. It is typically used to prevent unwanted feedback into an optical oscillator such as a laser cavity.

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OCT Variable Optical Delay Line

Our Variable Optical Delay Line provides fast and accurate optical path length control in a compact housing.

Based on a customisable chassis that can be adapted to incorporate additional optical components, the unit is designed to be easily incorporated into any modular optical coherence tomography (OCT) or similar interferometric system architecture.

Optical interface is through a single or dual fiber pigtails which can be specified to length and terminated with all commonly used optical connectors. Internal optical sensors can be used as reference location and travel limit switches.

Please contact us for further details related to use of the delay line within interferometric applications.

Key Features

Specifications

Parameter

Value

Notes

Wavelength range

850, 1060 and 1310 nm

Typical spectral bandwidth ±50 nm

Optical input power

<100 mW

Continuous exposure

Mechanical travel range

80 mm

Can be customized according to requirements

Optical delay range

1066 ps1

533 ps2

80 mm travel range

Travel speed

50 mm/s

Mechanical travel speed

Travel resolution

5 μm

Can be customized according to requirements

Optical delay resolution

0.03 ps

Dual fiber version

Optical IL

≤ 1.6 dB

Excludes connector loss, waveband dependant

IL over travel range

≤ 0.5 dB

 

WDL

≤ 0.6 dB

 

Temperature dependent IL

≤0.6 dB

 

Return loss

>55 dB

 

Operating temperature range

+15°C to +55°C

Typical

Dimensions

177x30x30 mm

Excludes fixing tabs and fiber pigtails

  1. For single fiber, point-and-return architecture
  2. For dual fiber architecture

Order Code

Order codes are comprised of a standard device prefix (e.g. ODL) followed by code letters or numbers which correspond to available options.

Sample: ODL-3AXXX1213 (SFF Delay Line, 1310 nm center wavelength, 50 mm/s travel speed, single fiber port configuration, 2 mm sleeving, 1 m pigtails, FC/APC connector).

COMPACT OCT OPTICAL SPECTROMETER

Our OpticalSpectrometer is a high resolution, flexible platform for spectral analysis of fiber coupled signals.

Based on a high quality transmission diffraction grating, the spectrometer unit allows high resolution spectral analysis in a robust and reliable package.

Designed to be incorporated into any OEM modular system architecture with applications in optical coherence tomography (OCT), gas detection and many other industrial, medical or scientific applications.

The optical input is via a fiber optic pigtail which can be specified to length and terminated with all commonly used optical connectors. The line scan camera detection unit is selected to provide optimum performance for the chosen operating wavelength range and resolution or may be specified by the customer.

Key Features

Key Benefits

Specifications

Parameter

Value

Notes

Wavelength range

840 nm

Typical spectral bandwidth ±50 nm

Other wavelengths available on request

Optical input power

<10 mW

 

Efficiency of optical train

>60%

 

Wavelength resolution

<0.1 nm/pixel

Dependent on combination of dispersive element, imaging optics and camera

Optical fiber input

Single-mode fiber

 

Number of pixels

512 / 1024 / 2048

Options available

Line rate

up to 250 kHz

Camera dependent

Operating temperature range

+10°C to +45°C

Typical

Dimensions

Refer to drawing

Overall dimensions depend on camera

OCT FIBER COLLIMATOR

A range of non-contact style, single mode, fiber collimators incorporating achromatic lenses.

Anti-reflection coatings are employed to minimize back reflections. Our proprietary alignment and assembly processes produce a beam having low pointing error that is stable over a wide range of environmental conditions.Our OCT Fiber Collimators are manufactured to high opto-mechanical tolerances to enable simple incorporation into production line processes.

Key Features

Example Optical Specifications 840 nm

Parameter

Specification

2 mm Diameter Beam Collimator

Lens focal

10.00 mm ± 0.5%

Operating wavelength

840 nm nominal

Lens AR coating

<1% reflection at 800-900 nm

Lens diameter

5 mm

Beam diameter (1/e2)

2.1 mm

Beam centering

<1 mrad

Beam focusing

>20 m

Mechanical OD

8 mm (-0.01 mm ~ -0.02 mm)

Fiber

Nufern 780-HP

3mm Diameter Beam Collimator

Lens focal distance

16.38 mm ± 0.5%

Operating wavelength

840 nm nominal

Lens AR coating

<1% reflection at 800-900 nm

Lens diameter

8 mm

Beam diameter (1/e2)

3.2 mm

Beam centering

<1 mrad

Beam focusing

>20 m

Mechanical OD

12 mm (-0.01 mm ~ -0.02 mm)

Fiber

Nufern 780-HP

Mechanical Outline:   2 mm Diameter Beam Collimator;  3 mm Diameter Beam Collimator

OCT COUPLER 1060 NM WIDEBAND

Fiber Optic couplers are used in the optical coherence tomography (OCT) light engine to form the interferometer that OCT systems use to generate depth information. A coupler with low wavelength dependence allows the system to operate over a wide wavelength range which increases depth resolution. The OCT wideband coupler splits over a wide bandwidth at the popular OCT wavelength band centered at 1060 nm. Designed for low loss and wide bandwidth operation, the coupler utilizes our proprietary fused fiber technology.

Key Features

Typical Optical Specifications

A sample of 10 50/50% couplers plotted in the wavelength range 980 nm to 1120 nm

Coupling Ratio1

Measured Bandwidth

1060 nm Band

Excess Loss2, 3

1060 nm Band

Coupling Ratio Tolerance2

Available Housing Option

1%

A=±20 nm

0.10 dB

±0.30%

3, 4, 5, 6

B=±35 nm

0.10 dB

±0.40%

C=±50 nm

0.10 dB

±0.50%

10%

A=±20 nm

0.10 dB

±1.5%

3, 4, 5, 6

B=±35 nm

0.10 dB

±2.5%

C=±50 nm

0.10 dB

±3.5%

20%

A=±20 nm

0.13 dB

±2%

3, 4, 5, 6

B=±35 nm

0.13 dB

±3%

C=±50 nm

0.13 dB

±4%

30%

A=±20 nm

0.13 dB

±2.5%

3, 4, 5, 6

B=±35 nm

0.13 dB

±3.5%

C=±50 nm

0.13 dB

±4.5%

50%

A=±20 nm

0.15 dB

±3.5%

3, 4, 5, 6

B=±35 nm

0.15 dB

±5%

C=±50 nm

0.15 dB

±6.5%

  1. Any coupling ratio available. Please contact sales office for details on coupling ratios not listed.
  2. Measured through P1 to P2 and P3

Parameter

Specification

Operating/storage temperature range1

-40 – +75°C/-40 – + 85°C

Pigtail tensile load

5 N

Fiber type2

Speciality single mode fiber

  1. For connectorized component, operating temperature range is –5 – +75°C.
  2. Fiber type to be confirmed upon request.
  3. Excess loss dependent on fiber type.

Housing Option

Housing Code

Description

1x2, 2x2 Dimensions (mm)

Pigtail

3

Regular

3.0 (∅) x 50 (L)

Primary-coated fiber 

4

∅0.9 mm slim

3.0 (∅) x 60 (L)

∅0.9 mm loose-tube

5

∅0.9 mm semi-ruggedized

5.0 (∅) x 75 (L)

∅0.9 mm loose-tube

6

∅3.0 mm fully-ruggedized

80 (L) x 10 (W) x 8 (H)

∅3.0 mm fan-out sleeving

Configuration

Order code

Order codes are comprised of a standard device prefix (e.g. OCT) followed by code letters or numbers which correspond to available options.

Sample: OCT-040K31A10 (OCT Wideband Coupler, 1040 nm center wavelength, 50/50 coupling ratio, regular housing, 1x2 port configuration, ±20 nm measured bandwidth, 1 m pigtails, no connectors)

OCT COUPLER 850 NM & 1030 NM WIDEBAND

Fiber optic couplers are used in the optical coherent tomography (OCT) light engine to form the interferometer that OCT systems use to generate depth information. A coupler with low wavelength dependence allows the system to operate over a wide wavelength range which increases depth resolution. The OCT wideband coupler splits over a wide bandwidth at the popular OCT wavelength band centered at 850 nm and 1030 nm. Designed for low loss and wide bandwidth operation, the coupler utilizes our proprietary fused fiber technology.

Key Features

Typical Optical Specifications

A sample of 75/25% couplers plotted in the wavelength range 1230 nm to 1390 nm

Coupling Ratio1

Measured Bandwidth

800 nm Band

Excess Loss2

1300 nm or 1500 nm Band

Excess Loss2

800 nm Band

Coupling Ratio Tolerance2

1030 nm and 1500 nm Band

Coupling Ratio Tolerance2

Available Housing Option

1%

A=±20 nm

0.10 dB

0.10 dB

±0.35%

±0.30%

3, 4, 5, 6

B=±35 nm

0.10 dB

0.10 dB

±0.45%

±0.40%

C=±50 nm

0.10 dB

0.10 dB

±0.55%

±0.50%

10%

A=±20 nm

0.13 dB

0.10 dB

±2.0%

±1.5%

3, 4, 5, 6

B=±35 nm

0.13 dB

0.10 dB

±3.0%

±2.5%

C=±50 nm

0.13 dB

0.10 dB

±4.0%

±3.5%

20%

A=±20 nm

0.15 dB

0.13 dB

±2.5%

±2%

3, 4, 5, 6

B=±35 nm

0.15 dB

0.13 dB

±3.5%

±3%

C=±50 nm

0.15 dB

0.13 dB

±4.5%

±4%

30%

A=±20 nm

0.20 dB

0.13 dB

±2.75%

±2.5%

3, 4, 5, 6

B=±35 nm

0.20 dB

0.13 dB

±3.75%

±3.5%

C=±50 nm

0.\20 dB

0.13 dB

±4.75%

±4.5%

50%

A=±20 nm

0.25 dB

0.15 dB

±4.0%

±3.5%

3, 4, 5, 6

B=±35 nm

0.25 dB

0.15 dB

±5.5%

±5%

C=±50 nm

0.25 dB

0.15 dB

±7.0%

±6.5%

  1. Any coupling ratio available. Please contact sales office for details on coupling ratios not listed.
  2. Measured through P1 to P2 and P3

Parameter

Specification

Operating/storage temperature range1

-40 – +75°C/-40 – + 85°C

Pigtail tensile load

5 N

Fiber type2

Speciality single mode fiber

  1. For connectorized component, operating temperature range is –5 – +75°C.
  2. Fiber type to be confirmed upon request.

Housing Option

Housing Code

Description

1x2, 2x2 Dimensions (mm)

Pigtail

3

Regular

3.0 (∅) x 50 (L)

Primary-coated fiber 

4

∅0.9 mm slim

3.0 (∅) x 60 (L)

∅0.9 mm loose-tube

5

∅0.9 mm semi-ruggedized

5.0 (∅) x 75 (L)

∅0.9 mm loose-tube

6

∅3.0 mm fully-ruggedized

80 (L) x 10 (W) x 8 (H)

∅3.0 mm fan-out sleeving

Configuration

Order code

Order codes are comprised of a standard device prefix (e.g. OCT) followed by code letters or numbers which correspond to available options.

Sample: OCT-310D52C13 (OCT Wideband Coupler, 1310nm center wavelength, 75/25% coupling ratio, 0.9 mm loose tube semi-ruggedized housing, 2x2 port configuration, ±50 nm measured bandwidth, 1 m pigtails, FC/APC connectors)

OCT COUPLER 850 NM & 1030 NM WIDEBAND

Fiber optic couplers are used in the optical coherence tomography (OCT) light engine to form the interferometer that OCT systems use to generate depth information.

Our EWOC has been developed to provide market leading performance for use in high resolution OCT imaging systems employing next generation wideband wavelength-swept sources. The EWOC splits over an extended bandwidth and can be ordered to operate at any of the popular OCT wavelength bands (850 nm, 1060 nm and 1310 nm). Designed for low loss and extended bandwidth operation, the coupler utilizes our proprietary fused fiber technology.

Key Features

Typical Optical Specifications

Sample of 50/50% couplers plotted in the wavelength range 940 – 1160 nm.

g Ratio1

Measured Bandwidth4

800 nm Band

Excess Loss2,3

1060 nm and 1310 nm Band

Excess Loss2,3,5

850 nm Band

Coupling Ratio Tolerance2,3

1060 nm and 1310 nm Band

Coupling Ratio Tolerance2,3

90/10

100nm

0.50 (typ <0.30)

0.30 (typ <0.15)

±3.0%

±2.5%

80/20

±3.5%

±3.0%

75/25

±3.75%

±3.25%

70/30

±4.0%

±3.5%

67/33

±4.25%

±3.7%

60/40

±5.0%

±4.0%

50/50

±6.5%

±5.0%

  1. Any coupling ratio available. Please contact sales office for details on coupling ratios not listed.
  2. Measured through P1 input.
  3. Performance through P4 input will closely match P1 – please contact sales office for details.
  4. Performance over entire bandwidth may be limited by the single-mode fiber cut-off.
  5. Excluding water peak band, centered around 1383 nm.
  6. Data supplied at center wavelength.

Parameter

Specification

Operating/storage temperature range1

-40 – +75°C/-40 – + 85°C

Pigtail tensile load

5 N

Fiber type2

850 nm: OFS/Furukawa CL 780 11 (CF04247-03)

 

1060 nm: Nufern 1060-XP

 

1310 nm: Corning SMF28

  1. For connectorized component, operating temperature range is –5 – +75°C.
  2. Alternative fiber types may be available upon request.

Housing Option

Housing Code

Description

1x2, 2x2 Dimensions (mm)

Pigtail

3

Regular

3.0 (∅) x 50 (L)

Primary-coated fiber 

4

∅0.9 mm slim

3.0 (∅) x 60 (L)

∅0.9 mm loose-tube

5

∅0.9 mm semi-ruggedized

5.0 (∅) x 75 (L)

∅0.9 mm loose-tube

6

∅3.0 mm fully-ruggedized

80 (L) x 10 (W) x 8 (H)

∅3.0 mm fan-out sleeving

Configuration

Order code

Order codes are comprised of a standard device prefix (e.g. OCT) followed by code letters or numbers which correspond to available options.

Sample: 060K31H10 (OCT Wideband Coupler, 1060 nm center wavelength, 50/50 coupling ratio, regular housing, 1x2 port configuration, ±100 nm measured bandwidth, 1 m pigtails, no connectors).

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