HP LSA3821-US, LSA3821-SF, LSA3821-AS, LSA2825-T-US, LSA2825-T-AS Datasheet

Analog Coaxial Pigtailed

Laser Module

Technical Data

Features

•Compact Coaxial Package

•Strained Multi Quantum Well (SMQW) Laser Chip

•Low Thresholds Current and Operating Currents

•Wide Operating Temperature –40°C to +85°C

•Optical Power May Be Customized up to 2 mW

•Convenient Variety of Pinout and Mounting Flange Options

Applications

•CATV/CCTV

•Return Path Links

•LANS/WANS

Description

The LSAX82X is a compact analog coaxial pigtailed laser transmitter, operating in the 1300 nm wavelength region and coupling light to single mode fiber.

The device features a high reliability SMQW laser diode and rear facet monitor photodiode. These are electrically connected to four pins in an industrystandard configuration.

Environmental performance is designed to be compatible with the requirements of Bellcore’s TA-NWT-000983 document.

LSA2825 - Analog

Coaxial Laser

LSA3821 - Dual-in-Line

Package

If the specific arrangement or performance you require is not listed, please contact your local representative, as our highly flexible design and manufacturing processes allow both physical and electro-optical customization to meet your needs.

Laser Safety Warning

This device is a Class IIIb (3b) Laser Product. It may emit invisible laser radiation if operated with the fiber pigtail disconnected. To avoid possible eye damage do not look into an unconnected fiber pigtail during laser operation. Do not exceed specified operating limits.

526	5965-7337E (5/97)

Absolute Maximum Ratings

Absolute limiting (maximum) ratings mean that no catastrophic damage will occur if the product is subjected to these ratings for short periods, provided that each limiting parameter is in isolation and all other parameters have values within the performance specification. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time.

			Limits
Parameter	Symbol	Test Condition	Min.	Max.	Units
Laser Forward Current	If	DC		120	mA
Laser Reverse Voltage	Vlr	DC		2	V
Photodiode Reverse Voltage	Vr	DC		20	V
Photodiode Forward Current	Ipf	DC		1	mA
Operating Temperature	Tc	Temperature measured at case	–40	+85	°C
Storage Temperature	Ts		–40	+85	°C
Relative Humidity	RH		noncondensing		%RH
Fiber Pull Strength		Three times; 10 sec.		10	N
Mechanical Shock		MIL-STD-883D, Method 2002,		500	G
		Condition A
Vibration		MIL-STD-883D, Method 2007,		20	G
		Condition A

Performance Specifications

			LSA2825
			LSA3821
Parameter	Symbol	Test Condition	Min.	Max.	Units
LASER		CW, Tc = –40°C to +85°C, Po as
		noted below unless otherwise
		stated
Rated Optical Power	Po	CW	1.0		mW
Threshold Current	Ith	Tc = +25°C	3.5	10	mA
Threshold Current	Ith		1	30	mA
Slope Efficiency	η	Tc = +25°C	30	80	μW/mA
Drive Current above Ith,	Id	Tc = +25°C	12.5	33.3	mA
for Im = Im (Po, +25°C)
		Tc = –40°C to +85°C	10	55	mA
Forward Voltage	Vf			1.6	V
Center Wavelength	λ	Tc = +25°C	1286	1336	nm
		Tc = –40°C to +85°C	1260	1360	nm
Wavelength/Temperature	Δλ/ T			0.4	nm/°C
Coefficient
Spectral Width	σ	One sigma, RMS		2.5	nm
MONITOR PHOTODIODE		Tc = +25°C, Vr = 5 V
Photocurrent	Im		200	1000	μA
Dark Current	Id	Po = 0 μW		20	nA
Capacitance	C	1 MHz		10	pF
Tracking Error	DP	Im = Im (Po, +25°C)	–1	+1	dB
		Tc + –40°C to + 85°C

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