Etalon Filter
Optical filters are wavelength lockers with extremely high wavelength stability, mainly used in wavelength tunable laser modules for optical communications.
FEATURE
This fiber pigtail etalon module operates at the 1.5-μm wavelength band.
The fiber output of the laser source is simply connected to the SC connector to obtain a transmitted etalon signal without the need for optical axis adjustment. The etalon is designed by our unique PLC (Planar Lightwave Circuit) and can obtain spectra with FSR=4.5GHz and FWHM=100 to 300MHz. The characteristics of etalon can be customized, therefore, please feel free to contact us for more information.
This module has four built-in etalon circuits, which can operate separately at the same time. Since a PLC substrate with excellent thermal conductivity is used, thermal response is fast, and a temperature controller to be provided by the customer enables highly stable wavelength-locked operation in a short period of time.
APPLICATION EXAMPLE
SPECIFICATIONS
Optical Characteristics
| Wavelength band | 1.55μm |
|---|---|
| FSR | 4.5GHz |
| FWHM | 100MHz～300MHz |
| Loss | < 5dB (Target) @1.55μm band |
Mechanical Characteristics
| Module size | 80mm x 60mm x 13mm |
|---|---|
| Temp. control | Peltier cooler |
| Thermistor | B = 3435 |
| Fiber pigtail | 1.3 PMF |
| Connector | SC/PC |
Test data
| Port | Transmittance [%] *1 Target: >31.6％ |
FSR [GHz] 4.5 GHz |
FWHM [MHz] *2 100 MHz - 300 MHz |
|---|---|---|---|
| 1 --> 8 | 27.3 | 4.44 | 394.7 |
| 2 --> 7 | 27.5 | 4.44 | 393.0 |
| 3 --> 6 | 26.7 | 4.44 | 382.0 |
| 4 --> 5 | 26.4 | 4.44 | 380.4 |
Spectrum
