Special Laser for Gas Detection

• Customization: Available
• Type: Fiber Transceiver
• Wiring Devices: ODF
• Model NO.: Special Laser for Gas Detection
• Condition: New
• Customization: Customized Logo
• Transport Package: Box
• Specification: Small
• Trademark: ZG
• Origin: Mianyang, China

Product Description

Temperature controlled pigtail laser series, using quantum well structure DFB laser, built-in semiconductor refrigeration, advanced laser welding process to achieve butterfly tail fiber packaging, compact structure, small volume, widely used in the field of optical fiber communication; Due to the advantages of high power and wavelength stability under high precision temperature control of semiconductor refrigeration, laser is widely used in the field of optical fiber sensor.
Features
Imported quantum well structure(OMQs) DFB semiconductor laser chip
Stable wavelength
High output power
hermetic package
Packaging:BF14 Pigtail type,TF8 space type,TO39 and other customized
Applications
Fiber optic Gas detection system
Production and testing of passive component for Gas detection
Rated limit operating conditions:

Parameters	Symbol	Value	Unit
Forward current of laser diode	If(LD)	100	mA
Reverse voltage of laser diode	Vr(LD)	2	V
Operating current of backlight detector	If(PD)	2	mA
Operating voltage of backlight detector	Vr(PD)	20	V
Operating current of refrigerator	ITEC	2.4	A
Operating voltage of refrigerator	VTEC	2.9	V
Operating temperature	Topr	-20~+70	ºC
Storage temperature	Tstg	-40~+85	ºC
Lead welding temperature/time	Tsld	260/10	ºC/s

Technical parameter:(Test environment temperature is 25ºC)

Parameters	Symbol	Condition	Min.	Typ.	Max.	Unit
Optical power	PO	CW	3		10	mW
Threshold current	Ith	CW	−	12	18	mA
Operating current	Iop	CW, 5mW	-	−	100	mA
Operating voltage	Vop	CW, 5mW	−	1.5	2.0	V
Slope efficiency	η	CW, 5mW	0.05	0.1	−	mW/mA
Peak wavelength	λp	CW, 5mW@25ºC	λc -1	λc	λc+ 1	nm
Wavelength stability	λs	CW,5mW@25ºC	-0.1nm		+0.1	dB
Side mode suppression ratio	SMSR	CW, 5mW	35	−	−	nm
Spectral width(20dB)	Δλ	CW, 5mW	−	0.2		nm/ºC
Wavelength drift coefficient with temperature	Δλ/T	Steady operating current		0.1		nm/ºC
Wavelength drift coefficient with current	Δλ/I	Steady operating temperature		0.01		nm/mA
Thermistor	Rth	Ttherm = 25ºC	9.5	10	10.5	kΩ

Attention:
In gas detection, according to the absorption spectrum data provided by HITRAN, there are usually several absorption peaks for the same gas. Customers should choose the best center wavelength location according to their own system needs.

Gas absorption reference table:               
                              

Gas component	Absorption wavelength
O2	761nm,764nm (VCSEL)
HF	1268.7nm,1273nm,1278nm
H2O	1368.59nm,1392nm
NH3	1512nm
C2H2	1532.68nm
CO	1567nm
H2S	1578nm
Co2	1580nm,2.0um
C2H4	1620nm,1627nm
CH4	1647nm,1650.9nm,1653.7nm,1660nm
HCl	1742nm

 External dimensions: