FST-001 Fiber Stretcher Module, Piezo-Driven Optical Delay Control
Piezo-driven fiber stretcher module from Luna with an optical path delay range of more than 3 mm and analog or 12-bit TTL control.
- Fiber type
- SMF-28 standard, others available
- Optical path delay range
- >3mm (air equivalent)
- Phase change sensitivity
- 810 π/V
- Insertion loss
- <0.2 dB
Overview
Luna has discontinued the FST-001. The Fiber Phase Shifter FPS-001 and FPS-002 are its listed replacements.
The FST-001-B Fiber Stretcher module is a length of optical fiber wound on a frame. Four piezo (PZT) elements stretch the frame, and the voltage applied to them controls the stretch. The optical module and its driver board are packaged together in a metal enclosure. The unit needs only +12 VDC power.
Each of the four piezos can be controlled independently. Driving them one at a time gives high resolution, and driving them together gives maximum range. The piezo drive voltages can be set with an analog voltage or with a 12-bit TTL signal. Under analog control, the driving circuit acts as a 4-channel voltage amplifier with 30V/V amplification. The output voltage can also be controlled by a computer with a digital I/O card or by a microprocessor.
The FST-001 suits mm-range optical path adjustments at frequencies from DC to 2 kHz. It can serve as a fine adjustment stage alongside a motorized delay line for path matching and measurement scanning in interferometric applications.
Key Features
- Large delay range
- Low insertion loss
- Analog or digital control
- High speed
- Four independently controllable piezo elements
- Analog input or 12-bit TTL digital control
- Driver board packaged in a metal enclosure
- Requires only +12 VDC power
Specifications
| Fiber type |
SMF-28 standard, others available
Datasheet: others available by request
|
|---|---|
| Optical path delay range | >3mm (air equivalent) |
| Phase change sensitivity |
810 π/V
SMF-28 fiber at 1550nm, analog input to all 4 channels
|
| Insertion loss |
<0.2 dB
Excluding connectors
|
| Insertion loss variation | <0.1 dB |
| PDL |
<0.05 dB
SMF-28 fiber, excluding connectors
|
| Return loss | > 65 dB |
| Wavelength range | 1260 to 1620 nm |
| Maximum optical power | 1000 mW min. |
| Internal voltage amplification | 30V/V |
|---|---|
| Max. voltage on PZT | 140 volts |
| Resonance frequency | 2.2±0.3 kHz |
| Digital input | 20-pin digital connector to accept 12 bit TTL control signal. |
| Software | None |
| Power | +12 VDC |
| Operation temperature | 0 to 50 °C |
|---|---|
| Storage temperature | -40 to 80 °C |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Optical coherence tomography (OCT)
- OEM modules for fiber optic sensing
- Sensors
- Interferometers
- Medical imaging
- Spectrum analysis
- Path matching and measurement scanning in interferometric applications
Options & Accessories
| Option | Description |
|---|---|
| 04 | Actuators: 4 PZT |
| 15 | Wavelength: 1550 nm |
| 13 | Wavelength: 1310 nm |
| SM | Fiber type: single-mode |
| PM | Fiber type: polarization-maintaining |
| FC/PC | Connector type: FC/PC |
| FC/APC | Connector type: FC/APC — Other connector types can be specified |
Documents & Resources
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