The DFB CWDM modules are based on high-performance distributed feedback laser diodes.
OSICS DFB CWDM offers +10 dBm of optical power coupled in a polarization maintaining fiber with a remarkable 5 pm wavelength stability over one hour. The internal wavelength calibration yields a 30 pm accuracy and the wavelength can be finely tuned over 1.8 nm (typ.) with the internal temperature control.
All CWDM channels from 1270 nm to 1610 nm are available, with two additional channels: 1625 nm and 1650 nm.
| DFB CWDM SMF | DFB CWDM PM13 | DFB CWDM PM15 |
| Models | Wavelength of first channel | 1270 nm | 1310 nm | 1450 nm |
| Wavelength of last channel | 1650 nm | 1650 nm |
| Wavelength | Channel center*1 | wavelength grid ±3 nm |
| Tuning range | 1.6 nm (1.8 nm typ.) |
| Accuracy*2 | ±0.03 nm |
| Stability over 1 hour*2,*3,*4 | ±0.005 nm |
| Stability over 24 hours*2,*3,*4 | ±0.005 nm typ. |
| Power | Maximum | 10 mW (for channels from 1270 to 1570 nm)
8 mW (for channels from 1590 to 1650 nm) |
| Stability over 1 hour*2,*3,*4 | ±0.01 dB |
| Stability over 24 hours*2,*3,*4 | ±0.01 dB typ. |
| Optical isolation | > 30 dB |
| RIN*5 (Relative Intensity Noise) | < -140 dB/Hz |
| Spectrum | Laser line width | < 10 MHz |
| SMSR (Side Mode Suppression Ratio)*2 | > 30 dB (40 dB typ.) |
*1: Conditions: power at 10 dBm, CW operation, diode temperature at 25°C.
*2: After warm-up and at maximum power.
*3: At a constant temperature.
*4: Measured with an APC terminated jumper on a power-meter.
*5: RIN within the range 100 MHz–20 GHz measured at 10 dBm output power with RBW = 30 kHz.
Applications
- CWDM: The OSICS DFB CWDM modules allow to fully load the system for testing at maximum capacity.
- OSC: The 1510 nm or the 1625 nm channels are most used for this application.
- OTDR: 1625 nm or 1650 nm can be used when a line is in operation without disturbing traffic.
