1550nm Single Mode Polarization Insensitive Optical Isolator
P/N: FIR-1550-SM-PI-OI|SKU: 10205
Unit Price
MOQ: 1 pcs
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1550nm Single Mode Polarization Insensitive Optical Isolator
The 1550nm Single Mode Polarization Insensitive Optical Isolator is a passive fiber optic device designed to ensure unidirectional light transmission while effectively suppressing back reflections in optical systems. Operating at the 1550 nm wavelength, it is optimized for standard telecom and fiber laser applications.
This isolator features a polarization insensitive design, maintaining stable performance regardless of the input polarization state, which is critical in real-world fiber networks where polarization varies randomly. With low insertion loss (as low as 0.5–0.6 dB for dual stage), high isolation up to 55 dB, and excellent return loss, it provides reliable protection for laser sources and enhances overall system stability.
Available in both single stage and dual stage configurations, this device supports a wide range of optical power levels and is suitable for use in optical amplifiers, DWDM systems, and precision laser setups.
Specifications
Parameter | Unit | Value | |
|---|---|---|---|
Center Wavelength | nm | 1550 | |
Operating Wavelength Range | nm | ±20 | ±20 |
Single/Dual Stage | - | Single Stage | Dual Stage |
Peak Isolation (Typ.) | dB | 45 | 55 |
Isolation (Min.) | dB | 32 | 45 |
Insertion Loss (Max.) | dB | 0.5 | 0.6 |
Return Loss (Min.) | dB | 50 | |
Polarization Dependent Loss | dB | ≤0.2 | |
Max Optical Power (CW) | W | 0.5/1/2/5 | |
Max Peak Power (Pulse) | KW | <1@ns pulse | |
Fiber Type | - | SMF-28e | |
Package Dimensions | mm | Φ5.5 x L35 | |
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.
Dimensions
FAQ
- Q: How do I choose between single stage and dual stage isolators?
- A: Single stage isolators provide lower insertion loss and are suitable for general applications. Dual stage isolators offer significantly higher isolation and are recommended for systems that require stronger back reflection suppression, such as high-power lasers or sensitive optical amplifiers.
- Q: Can this isolator be used for high-power laser applications?
- A: Yes, this isolator supports continuous wave (CW) optical power up to 0.5 W, 1 W, 2 W, or 5 W depending on the selected model. For high-power applications, it is recommended to select a higher power rating and dual stage configuration for improved reliability.
- Q: What applications typically require an optical isolator?
- A: Optical isolators are widely used in fiber laser systems, optical amplifiers (EDFA), DWDM transmission systems, and optical test setups to prevent back reflections and ensure stable operation.
- Q: Why does higher isolation usually come with higher insertion loss?
- A: Higher isolation is typically achieved by adding more optical stages (e.g., dual stage design), which increases the optical path and components involved. This results in slightly higher insertion loss, representing a trade-off between isolation performance and signal attenuation.
Questions & Answers
Does this isolator require any external power or control?
No. Optical isolators are passive devices and do not require any electrical power or external control.
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