1. Product Overview
This product is an In-Line Polarizer, used to purify and control the polarization state in fiber optic links, ensuring that the output light propagates strictly along a specified polarization axis, thereby improving the stability of polarization-sensitive systems. The product covers common wavelength bands such as 850 / 980 / 1064 / 1310 / 1550 nm, with bandwidths of ±10～±50 nm for different wavelengths, suitable for various applications including communication, lasers, and sensing. Typical insertion loss is as low as 0.3–0.8 dB, extinction ratio typical 28–30 dB (minimum ≥25–28 dB), return loss ≥50 dB, maximum power handling ≤300 mW. The entire unit is encapsulated in a φ5.5*35 mm steel tube + 1 m polarization-maintaining fiber pigtail, with a default FC/APC connector; the key is aligned with the slow axis.
2. Product Advantages
Low Insertion Loss, Low Power Loss
At 23°C, the typical insertion loss is only 0.3 dB in the 1310/1550 nm band, 0.4 dB in 1064 nm, and only 0.7–0.8 dB in 980/850 nm. The maximum insertion loss is controlled at ≤0.5 / 0.6 / 0.9 / 1.0 dB, with minimal impact on system power budget and OSNR, making it suitable for precision and long-link applications.
High Extinction Ratio, High Polarization Purity
In all operating bands, the typical extinction ratio reaches 28–30 dB, with a minimum value still ≥25–28 dB. This significantly suppresses undesirable polarization components, providing high polarization purity input light for interferometry, coherent detection, polarization-maintaining amplifiers, and high-contrast measurements.
Multiple Wavelength Options for Different Systems
Single Platform Coverage: 850 / 980 / 1064 / 1310 / 1550 nm
- 850 nm: Suitable for short-wavelength lasers and some sensing systems;
- 980 / 1064 nm: Suitable for fiber lasers, pump paths, and near-infrared applications;
- 1310 / 1550 nm: Suitable for communication and amplification systems.
Facilitates unified selection and maintenance for OEMs within the same series.
High-Quality Fiber Combinations for Polarization Maintenance and Versatility
Different wavelength bands utilize PM1310 / PM1550 / PM980 / PM850 panda-type polarization-maintaining fiber or high-quality single-mode fibers such as SMF-28e, HI1060, and SM800, ensuring excellent polarization-maintaining performance while maintaining compatibility with common single-mode links.
High Reliability Design, Compliant with Industry Standards
Device return loss ≥50 dB, power handling capacity ≤300 mW, operating temperature -5～+70 ℃, storage temperature -40～+80 ℃, and compliant with Telcordia and RoHS requirements, suitable for long-term online use in engineering and operational applications.
Clear Performance Prediction with Connector, Facilitating Link Design
Specifications clearly state: with connector, IL increases by approximately 0.3 dB, RL decreases by approximately 5 dB, and ER decreases by approximately 2 dB, and the connector key is aligned with the slow axis by default, facilitating precise link budgeting and polarization management by engineers during the design phase.
3. Product Features (Key Features)
| Parameters |
Unit |
Value |
| Operating Wavelength |
nm |
1310, 1550 |
1064 |
980 |
850 |
| Bandwidth |
nm |
±50 |
±30 |
±10 |
±10 |
| Typ. Insertion Loss @23℃ |
dB |
0.30 |
0.40 |
0.7 |
0.8 |
| Insertion Loss @ 23℃ |
dB |
≤0.5 |
≤0.6 |
≤0.9 |
≤1.0 |
| Typ. Extinction Ratio@ 23℃ |
dB |
30 |
30 |
28 |
28 |
| Extinction Ratio @23℃ |
dB |
≥28 |
≥28 |
≥25 |
≥25 |
4. Package Outline
Packaging Form
Standard steel tube packaging: φ5.5 * L35 mm, with a polarization-maintaining/single-mode fiber pigtail at each end. Compact structure, easy to install in modules, cassette devices, or 1U/2U chassis trays.
Fiber Optics and Pigtails
Standard Pigtail Length: 1.0 ±0.05 m
Fiber Optic Type Examples:
1310/1550 nm: PM1310 or PM1550 (Panda)
1064/980 nm: PM980 or HI1060
850 nm: PM850 or SM800
Sheath Type: Standardly comes with a 0.9 mm loose tube (such as a Hytrel white tube), but 250 μm bare fiber or other structures can also be selected according to the order code.
Connectors and Polarization Alignment
Standard Connector: FC/APC, FC/UPC, SC/UPC, SC/APC, LC/UPC, LC/APC, or connectorless versions are also available according to the order information.
By default, the connector key is aligned with the slow axis to ensure clear polarization direction during installation, splicing, and replacement, facilitating a unified polarization reference with other polarization-maintaining devices in the system (such as PM jumpers and PM couplers).
5. Applications
- Fiber Optic Instrument
- Fiber Sensor
- Online polarization control and purification for various polarization-sensitive fiber optic systems
