1550nm Polarization Maintaining In-Line Manual Variable Optical Attenuator
P/N: FIR-1550-PM-IL-M-VOA|SKU: 10037
Unit Price
MOQ: 1 pcs
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Below is a general estimate for most orders. For exact delivery time, please contact [email protected].
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1550nm Polarization Maintaining In-Line Manual Variable Optical Attenuator
The 1550nm Polarization Maintaining In-Line Manual Variable Optical Attenuator provides adjustable optical attenuation at 1550nm while maintaining polarization state using a screw-driven mechanism for continuous and repeatable control. It is built with PM1550 polarization maintaining fiber and features a maximum insertion loss of ≤0.5 dB, an attenuation range of 0.5–60 dB, and a minimum return loss of ≥50 dB for stable signal performance. The extinction ratio is ≥20 dB. The all-fiber in-line design requires no external power, allowing direct integration into polarization-sensitive fiber optic systems. The slow axis is aligned to the key by default, with fast axis or both axis options available. It supports a maximum continuous optical power of 500 mW and is suitable for laboratory testing, optical measurement, and polarization-sensitive applications.
Specifications
Parameter | Unit | Value |
|---|---|---|
Center Wavelength | nm | 1550 |
Operating Wavelength Range | nm | ±50 |
Insertion Loss (Max.) | dB | 0.5 |
Attenuation Range | dB | 0.5 - 60 |
Extinction Ratio (Min.) | dB | 20 |
Return Loss (Min.) | dB | 50 |
Max Optical Power (CW) | mW | 500 |
Fiber Type | - | PM1550 |
Working Axis | - | Slow Axis (Default) or Fast Axis or Both Axis |
Tensile Load (Max.) | N | 5 |
Package Dimensions | mm | 26 x 18 x 8 |
Operating Temperature | °C | -5 to +70 |
Storage Temperature | °C | -40 to +85 |
Notes: Tested at 25 °C. Data exclude connectors. Adding connectors will increase insertion loss by approximately 0.3 dB, reduce return loss by 5 dB, and decrease extinction ratio by 2 dB. The fiber slow axis is aligned to the key by default. For Fast Axis or Both Axis options, please contact [email protected] for pricing.
Dimensions
FAQ
- Q: Why is a polarization maintaining VOA required for 1550 nm applications?
- A: In 1550 nm systems—especially in fiber lasers, coherent communication, and interferometric setups—maintaining a stable polarization state is critical for system performance. A polarization maintaining VOA ensures precise optical power control while preserving polarization alignment, preventing signal instability and degradation that may occur when using a standard VOA.
- Q: What attenuation range is typically used for a 1550nm PM VOA?
- A: A typical 1550nm PM VOA provides an attenuation range from approximately 0.5 dB to 60 dB, allowing flexible adjustment of optical power levels. Lower attenuation values are commonly used for fine tuning, while higher attenuation is suitable for system testing, calibration, or protecting sensitive optical components.
- Q: What fiber types and configurations are available for a 1550nm PM VOA?
- A: The 1550nm PM VOA is typically built with PM1550 fiber and supports multiple configuration options, including slow axis (default), fast axis, or both-axis alignment. It can also be customized with different connector types such as FC/APC, FC/UPC, or bare fiber. Custom specifications are available upon request to meet specific system requirements.
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