1625nm Pulse Laser Modules for OTDR

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Our 1625nm pulse laser modules for OTDR are equipped with a high power FP chip with low threshold current and high-efficiency output. Capable of working with a high current, the pulsed laser module can operate in dual mode, pulse and direct current. The multi-mode fiber is optional. This laser diode is generally used in the communication and testing systems that use OTDR and Raman light reflection principles.

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
Pulsed Forward Current	IFP			700	mA
Reverse Voltage	VR			2	V
Reverse Voltage (monitor PD)	VRM			10	V
Reverse Current (monitor PD)	IFPM			2	mA
Operating Temperature	TC	0		60	°C
Storage Temperature	Tstg	-40		85	°C
Lead Soldering Temperature	Tsld			260(10s)	°c
Relative Humidity (Noncoagulable)	RH			85	%

Optical & Electrical Characteristics

Parameter	Symbol	Min.	Typ.	Max.	Unit	Notes
Forward Voltage	VFP			3.0	V	IFP = 400 mA, PW = 10 μs, Duty = 1%
Threshold Current	Ith		20	35	mA
Optical Output Power From Fiber	Pf	40			mW	IFP =400 mA, PW = 10 μs, Duty = 1%
Center Wavelength	λc	1620	1625	1630	nm	IFP =400 mA, PW = 10 μs, Duty = 1%
Spectral Width	σ			4	nm	RMS (−3 dB)
Rise Time	tr		0.5	2.0	ns	10-90%
Fall Time	tf		0.5	2.0	ns	90-10%
Monitor Current	Im	0.05		2	mA	VRM =5 V