Products Description
OPTICO offers a premium series of polarization-maintaining (PM) 1x2 couplers covering the full spectrum (460–2000 nm), designed to split a single fiber input into two output paths. These couplers utilize PANDA fiber to deliver high extinction ratios for light entering the fiber's slow axis. The polarization-maintaining fused biconical taper (FBT) couplers are engineered for high-precision optical signal transmission systems, enabling efficient power distribution while preserving the polarization state of the optical signal. This product line is widely used in demanding applications such as fiber optic sensing, optical communication systems, interferometry, quantum communication, and scientific research, where exceptional polarization retention and stability are critical.
The PM480/PM530 1x2 FBT couplers are optimized for common medical and imaging wavelengths, including 473 nm, 488 nm, 520 nm, and 532 nm.
For couplers operating in the 560–2000 nm range, beam-combining applications are generally not recommended. Unused ports are internally terminated within the coupler housing to minimize back reflections.
1x2 PM Coupler Selection Guide.
Unmatched Flexibility Across the Spectrum.
From ultraviolet to infrared, OPTICO's 1×2 PM FBT Coupler supports an exceptionally broad wavelength range - spanning from 405 nm to 2000 nm. Whether your application requires narrowband (±15 nm) precision or wideband (±40~100 nm) coverage, our PM FBT couplers offer an extensive selection to meet the needs of quantum optics, fiber interferometry, biomedical systems, and telecom applications.
Product Specifications
|
Parameter |
Specification |
|||||
|
Operating Wavelength |
480±15nm |
780±15nm |
980±15nm |
1064±65nm |
1950±100nm |
|
|
Insertion Loss |
50:50 |
4.1 /4.1 |
3.9 /3.9 |
3.6 /3.6 |
4.1 /4.1 |
3.4/3.4 |
|
25:75 |
2.2/7.2 |
2.0/7.0 |
1.7/6.7 |
2.0/7.5 |
1.6/6.5 |
|
|
90:10 |
1.3/11.5 |
1.1/11.1 |
0.9/10.9 |
1.0/11.9 |
0.8/10.8 |
|
|
99:1 |
0.9/24.8 |
0.7/24.6 |
0.5/24.4 |
0.6/27.5 |
0.4/23.3 |
|
|
Extinction Ratio |
50:50 |
18.0/18.0 |
18.0/18.0 |
20.0/20.0 |
18.0/18.0 |
20.0/20.0 |
|
25:75 |
18.0/18.0 |
18.0/18.0 |
20.0/20.0 |
18.0/18.0 |
20.0/18.0 |
|
|
90:10 |
18.0/18.0 |
18.0/18.0 |
20.0/20.0 |
18.0/18.0 |
20.0/17.0 |
|
|
99:1 |
16.0/16.0 |
16.0/16.0 |
20.0/16.0 |
18.0/18.0 |
20.0/11.0 |
|
|
Return loss(dB) |
Min |
60 |
||||
|
Excess loss(dB) |
Max |
0.7 |
0.5 |
0.3 |
0.5 |
0.5 |
|
PDL |
<0.1 dB |
|||||
|
Operating Temperature |
-40°C to +85°C |
|||||
|
Fiber Type |
Coherent PM |
|||||
|
Coupling Ratio |
1% to 50% (customizable) |
|||||
|
Configuration |
1x2, 2x2 available |
|||||
|
Pigtail Length |
Customizable |
|||||
|
Jacket Material |
900μm/2.0mm/3.0mm PVC or steel tube |
|||||
| For more wavelength OEM/ODM, Please refer to the attached specifications | ||||||
Product Features
- High Extinction Ratio: Effectively maintains the polarization state of light, ensuring stability in polarization-sensitive applications.
- Low Insertion Loss: Employs precise fused tapering technology to deliver excellent optical performance.
- Excellent Stability: Maintains reliable performance under varying temperatures and mechanical stress, making it suitable for diverse environments.
- Compact Structure: Small form factor enables easy integration and installation.
- Multiple Coupling Ratios Available: Offered in 1×2 and 2×2 configurations, with customizable coupling ratios from 1% to 50%.
Customizable Options
- Operating Wavelength: Customizable from 650 nm to 2000 nm
- Coupling Ratio and Channel Count: Options such as 1×3, 1×4, etc.
- Fiber Types: PM PANDA, PM PANDA + SM, etc.
- Pigtail Length and Jacket Material: Available in 900 μm, 2.0 mm, or 3.0 mm PVC jackets, or steel tube.
Product Application
- High-speed optical communication systems
- Fiber optic interferometry and sensing systems
- Polarization control in laser systems
- Quantum optics and precision measurement
- Integrated testing of polarization-maintaining devices
Hot Tags: polarization maintaining 1x2 fbt coupler, China, manufacturers, suppliers, factory, wholesale, customized
Nsertion Loss: The reduction in optical power from the input to the output of the coupler. For polarization-maintaining (PM) devices, this measurement is performed under specific conditions-typically with the Fast Axis Blocked. This means insertion loss is measured exclusively for light transmitted through the Slow Axis, while the Fast Axis is suppressed.
Its calculation formula：
Extinction Ratio (ER): The ratio of output power between the Slow Axis and Fast Axis, indicating the device's ability to maintain polarization along a single axis.
Its calculation formula：
PSlow Axis: Optical power aligned with the Slow Axis at the output.
PFast Axis: Leakage optical power along the Fast Axis at the output.
Test Method:
Use a polarized light source and launch the light along the Slow Axis.
Use a polarization separator (e.g., a polarizing beam splitter, PBS) to separate the Slow and Fast Axes at the output.
Measure the output power on the Slow and Fast Axes respectively.
PDL (Polarization Dependent Loss): The variation in insertion loss of a device when the polarization state of the input light changes.
Its calculation formula：
Pmax:The maximum output power measured under varying polarization states.
Pmin: The minimum output power measured under varying polarization states.
Test Method:
Input signal light using a light source with an adjustable polarization state.
Rotate the polarization state to observe the maximum and minimum insertion loss values.
Calculate the PDL based on the maximum and minimum values.
Return loss: Return Loss (RL) refers to the ratio of the light power reflected back from the input end of the device to the input power (expressed in decibels dB), which reflects the device's ability to suppress the reflected light.
Its calculation formula：
Preturn : The optical power reflected back to the input terminal.
Pinput : The input optical power.
Test Method : Use an OTDR or a dedicated reflection tester to measure the reflected optical power at the device's input end, and calculate the return loss (RL).
Excess Loss (EL) : Excess Loss refers to the difference between the input power and the total output power of the device-i.e., the additional power loss beyond the intended coupling ratio. It directly affects the overall insertion loss (IL) of the device and impacts the system's signal power budget.
Excellent process control can effectively reduce Excess Loss, thereby improving overall device performance.
Its calculation formula：
Pin : Input optical power
P1 and P2: The output optical work measured at the two output ports (such as Port1 and Port2
