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Keywords: HP Polarization Insensitive Isolator
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.
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.
| 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 |
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).
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.
| 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 |
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.
| 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
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.
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% |
| Parameter | Specification |
| Operating/storage temperature range1 | -40 –+75°C/-40 –+ 85°C |
| Pigtail tensile load | 5 N |
| Fiber type2 | Speciality single mode fiber |
| 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 |
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)
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.
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. 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% |
| Parameter | Specification |
| Operating/storage temperature range1 | -40 –+75°C/-40 –+ 85°C |
| Pigtail tensile load | 5 N |
| Fiber type2 | Speciality single mode fiber |
| 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 |
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)
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.
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% |
| 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 |
| 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 |
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).
