FS – Optical Fiber Stretcher
Optics
Manual
The FS Optical Fiber Stretcher is a highly customizable optic fiber stretcher based on a piezoelectric tube actuator. The selected fiber is wound onto the tube with a controlled tension. During operation, a voltage applied to the piezoelectric tube results in a change in diameter and a proportional change in the optical path length.
Customizations include the fiber type, number of turns, optical connection type, and electrical drive configuration. Single-mode (SM) and polarization-maintaining (PM) fibers are available. The PiezoDrive FS Optical Fiber Stretcher can be purchased in an enclosure or as an OEM component. The enclosed option uses two FC/APC optical connectors and has two electrical configurations available.
The two electrical configuration options are single-ended, and differential. The simplest option is the single-ended connection, where the external tube surface is grounded, and only the internal tube electrode is driven, which requires one high-voltage amplifier. Alternatively, the differential option has electrical connections to both the internal and external tube electrodes, which requires two high-voltage amplifiers. The differential configuration may be suitable for some applications that require maximum bandwidth or displacement range, since the voltage and power requirements of each high-voltage amplifier are halved. The enclosed version can be supplied with BNC or SHV electrical connectors.
Applications include variable optical delays, interferometers, laser stabilization, and laser tuning.
Specifications:
| Specification | Value | Notes |
|---|---|---|
| Maximum Input Voltage | -500 to + 2000 V | Dependent on connector type and configuration |
| Tube Capacitance | 289 nF | |
| Electrical Connectors | BNC or SHV | |
| Wavelength Range | 320 to 2100 nm | Dependent on fiber choice |
| Optical Path Displacement Sensitivity | 36 nm/V/turn | Dependent on the number of fiber turns |
| Number Of Turns | 1, 5, 10, 15, ....80 | |
| Total Fiber Length | 300 mm + 1800 mm/turn | Dependent on the number of fiber turns |
| Resonance Frequency | 14 kHz | |
| Fiber Type | SM or PM | |
| Optical Connectors | FC/APC | |
| Optical Connectors (OEM) | Custom |
Single Mode Fibers
| Order Code | Specifications | ||
| SM300 | 0.13 NA; 320 – 430 nm; Cladding: 125 um | ||
| S405-XP | 0.12 NA; 400 – 680 nm; Cladding: 125 um | ||
| SM450 | 0.12 NA; 488 – 633 nm; Cladding: 125 um | ||
| 460HP | 0.13 NA; 450 – 600 nm; Cladding: 125 um | ||
| SM600 | 0.13 NA; 633 – 780 nm; Cladding: 125 um | ||
| SM400 | 0.13 NA; 405 – 532 nm; Cladding: 125 um | ||
| 630HP | 0.13 NA; 600 – 770 nm; Cladding: 125 um | ||
| S630-HP | 0.13 NA; 630 – 860 nm; Cladding: 125 um | ||
| 780HP | 0.13 NA; 780 – 970 nm; Cladding: 125 um | ||
| SM800-5.6-125 | 0.13 NA; 830 nm; Cladding: 125 um | ||
| SM800G80 | 0.16 NA; 830 nm; Cladding: 80 um | ||
| SM980-5.8-125 | 0.14 NA; 980 –1650 nm; Cladding: 80 um | ||
| SM980G80 | 0.18 NA; 980 – 1650 nm; Cladding: 80 um | ||
| 1060XP | 0.14 NA; 980 – 1600 nm; Cladding: 125 um | ||
| 980HP | 0.2 NA; 980 – 1600 nm; Cladding: 125 um | ||
| 1310BHP | 0.13 NA; 1300 – 1625 nm; Cladding: 125 um | ||
| SM1250G80 | 0.12 NA; 1310 – 1550 nm; Cladding: 80 um | ||
| SM2000 | 0.11 NA; 1700 – 2100 nm; Cladding: 125 um | ||
| UHNA1 | 0.28 NA; 1100 – 1600 nm; Cladding: 125 um | ||
| UHNA3 | 0.35 NA; 960 – 1600 nm; Cladding: 125 um | ||
| UHNA4 | 0.35 NA; 1100 – 1600 nm; Cladding: 125 um | ||
| DCF13 | 0.12 NA; 1250 – 1600 nm; Cladding: 125 um | ||
| DCF4 | 0.11 NA; 1500 – 1625 nm; Cladding: 125 um | ||
| SM1550P | 0.10 – 0.14 NA; 1310 – 1550 nm; Cladding: 125 um | ||
Polarization Maintaining Fibers
| Order Code | Specifications | ||
| PM-S350-HP | 0.12 NA; 350 – 460 nm; Cladding: 125 um | ||
| PM-S405-XP | 0.12 NA; 400 – 680 nm; Cladding: 125 um | ||
| PM460-HP | 0.12 NA; 460 – 700 nm; Cladding: 125 um | ||
| 460HP | 0.13 NA; 450 – 600 nm; Cladding: 125 um | ||
| PM630-HP | 0.11 NA; 620 – 850 nm; Cladding: 125 um | ||
| PM780-HP | 0.12 NA; 770 – 1100 nm; Cladding: 125 um | ||
| PM980-XP | 0.12 NA; 970 – 1550 nm; Cladding: 125 um | ||
| PM1300-XP | 0.12 NA; 1270 – 1625 nm; Cladding: 125 um | ||
| PM1550-XP | 0.13 NA; 1440 – 1625 nm; Cladding: 125 um | ||
| PM2000 | 0.2 NA; 1850 – 2200 nm; Cladding: 125 um | ||
| PS-PM980 | 0.12 NA; 980 nm; Cladding: 125 um | ||
| HB830Z | 0.14 NA; 780 – 850 nm; Cladding: 80 um | ||
| HB1550Z | 0.09 – 0.11 NA; 1500 nm; Cladding: 125 um | ||
| HB800G | 0.16 NA; 830 nm; Cladding: 80 um | ||
| HB980T | 0.14 NA; 980 nm; Cladding: 125 um | ||
| HB1250T | 0.12 NA; 1310 nm; Cladding: 125 um | ||
| HB1500T | 0.12 NA; 1550 nm; Cladding: 125 um | ||
Optical Connectors For OEM
| Order Code | Specifications | ||
| FC/PC | FC/PC | ||
| FC/APC | FC/APC | ||
| LC/PC | LC/PC | ||
| SC/PC | SC/PC | ||
| ST | ST | ||
| SMA | SMA | ||
| LC/SSF | 1.25 mm (LC) Stainless Steel Ferrule | ||
| LC/CF | 1.25 mm (LC) Ceramic Ferrule | ||
| FC/SSF | 2.5 mm (FC) Stainless Steel Ferrule | ||
| FC/CF | 2.5 mm (FC) Ceramic Ferrule | ||
| SMA/N | SMA with Hex Nut | ||
Mechanical Specifications
| Specification | Value | Notes |
| Enclosure Dimensions | 171 x 153 x 90 mm | L x W x H |
| OEM Dimensions | 90 x 90 x 52 mm | L x W x H |
| Humidity | Non-condensing |
Choosing Number of Turns
The PiezoDrive FS Optical Fiber Stretcher allows for high customization. A key parameter that can be adjusted is the optical path displacement (OPD) sensitivity, which can be adjusted by changing the number of fiber turns. The ideal number of turns is determined by the available voltage range and the required change in path length. To simplify the choice of turns and driver, an online tool is available below. Alternatively, please contact advice and configuration inquiries. The configuration tool requires that you provide the required displacement and bandwidth needed for your application. Additionally, your signal source’s effective number of bits can be provided, allowing the tool to estimate the fiber stretcher’s resolution.
- Thermally limited: This means that the tube needs to be driven with a high power to achieve the required displacement. This is suitable for short periods of operation but not continuous operation, which may result in overheating. This issue commonly arises when the required displacement is large and the number of turns is already maximized.
- Not suitable: The driver will not supply enough current to provide the required displacement at the stated frequency. This requires more turns or more driver current.
- Recommended Number of Turns: the ideal number of turns that meet the requirements for a given driver.
- Resolution: the minimum step size, assuming a 16 bit input.
- Required Voltage: the voltage recommended to meet the required displacement.
- Maximum continuous operating frequency at required voltage: continuously operating above this frequency will thermally damage the fiber stretcher .
- Maximum intermitted operating frequency at required voltage: the maximum frequency that the amplifier can output at the required voltage.
- Optical displacement at amplifier’s maximum Voltage: the change in the optical path at the amplifier’s full voltage range.
- Cost: cost of the amplifier(s) in USD. Note, two PX200s are required for the differential configuration.
Ordering
You can either order the PiezoDrive FS Optical Fiber Stretcher through Micromechatronics, Inc or request a quote from mmech.com/rfq. If requesting a quote, it is preferred that you provide an order code for your preferred configuration. The PiezoDrive FS Optical Fiber Stretcher has the following order code format:
FS-(Fiber Type)–(Fiber Order Code)-N(Number of Turns)–( Enclosure)–(Optical Connector 1)–(Optical Connector 2)–(Electrical Configuration)
- Fiber Type: SM or PM
- Fiber Order Code: see SM and PM fiber tables
- Number of Turns: number of fiber winds around the tube
- Enclosure: blank if OEM or ENCL for the enclosure option
- Optical Connector 1/Optical Connector 2: blank for the enclosure option or see optical connector table
- Electrical Configuration: blank for OEM option or see the electrical configurations table
Example 1: OEM with 35 turns of SM300 single-mode optic fiber using FC/APC connectors: FS-SM-SM300-N35-FC/APC-FC/APC
Example 2: single point BNC enclosure with 70 turns of 460HP polarization-maintaining optic fiber: FS-PM-460HP-N70-ENCL-BNCSGL
Standard Delivery Contents
- PiezoDrive FS Optical Fiber Stretcher (in chosen configuration)
Certifications
Warranty and Service
The PiezoDrive FS Optical Fiber Stretcher is guaranteed against manufacturing defects for 12 months from the date of purchase. Contact your distributor or This email address is being protected from spambots. You need JavaScript enabled to view it. for service. Please include the amplifier serial number.
