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 hour2,3,*4	±0.005 nm
	Stability over 24 hours2,3,*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 hour2,3,*4	±0.01 dB
	Stability over 24 hours2,3,*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.

Optics Application Co., Ltd.

CWDM DFB Laser OSICS DFB CWDM