976 nm Laser Diode

PH976DBR Series High-Power Single-Frequency Laser Diode

Technology

DBR Single-Frequency Laser Chip
AlGaAs QW Active Layer
Epi designed for high reliability

Features

Available in several package styles
Pulsed operation for spectral stability at short pulse lengths
High power for CW applications
High Slope Efficiency

Description

The PH976DBR Series of high-power edge-emitting lasers are based on Photodigm’s advanced single-frequency laser technology. It provides a diffraction limited, single lateral and longitudinal mode beam. Facets are passivated for high-power reliability. Applications include Yb narrow band pumping, spectroscopy, difference frequency generation, and low power DPSS
replacement.

Absolute Maximum Rating

Parameter	Symbol	Unit	Min	Max
Storage Temperature	T_STG	°C	0	80
Operating Temperature	T_OP	°C	5.0	70
CW Laser Forward Current,T=T_op	I_F	mA	-	250**
Pulsed Laser Forward Current, T=25°C,	I_F	A	-	0.5
PW=300 ns, DC=10%	I_F	A	-	0.5
Laser Reverse Voltage	V_R	V	-	2.0
Photodiode Forward Current 1/ 2/	I_P	mA	-	5.0
Photodiode Reverse Voltage 1/ 2/	V_R	V	-	20.0
Photodiode Dark Current, V_R=10V, LD I_F=0, 2/	I_D	nA	-	50
TEC Current 1/ 2/	I_TEC	A	-2.5	2.5
TEC Voltage 1/ 2/	V_TEC	V	-6.0	6.0
Thermistor Current 1/ 2/	I_THRM	mA	-	1.0
Thermistor Voltage 1/ 2/	V_THRM	V	-	10
External Back Reflection	-	dB	-	-14
ESD (HBM)	-	V	-	500
Lead Soldering Temperature, 10 sec. Max., 2/	-	°C	-	260
Fiber Pull Force 1/	-	N	-	5.0
Fiber Bend Radius 1/	-	mm	-	35

1/ Butterfly package 2/ TO8 package**Do not exceed drive current or operating power of supplied LIV

CW Characteristics at T_C= 25°C unless otherwise specified

Parameter	Symbol	Unit	Min	Typ	Max
Center Wavelength	λc	nm	974	976	978
Optical Output Power @ LIV current	Po	mW	See Power Options Call-out
Slope Efficiency, 1/	ηd	W/A	0.3	0.36
Slope Efficiency	ηd	W/A	0.6	0.72	-
Threshold Current	Ith	mA	-	30	40
Laser Series Resistance	R_S	Ω	-	2.0	2.5
Laser Forward Voltage	V_F	V	-	2.0	2.5
Thermistor Resistance @ 25°C, 2/	R_T	KΩ	-	10	-
Photodiode Dark Current, V_R=10V, LD I_F=0, 2/	I_D	nA	-	-	50
Laser Line Width	∆v	MHz	-	8	10
Beam Divergence @ FWHM	θװ X θ_┴	º	-	6 X 32	8 X 34
Side Mode Suppression Ratio	SMSR	dB	-30	-	-
Polarization Extinction Ratio, 1/	PER	dB	-16	-19	-
Laser Polarization				TE
Mode Structure			Fundamental Mode

1/ Butterfly package 2/ TO-8 package

Handling Precautions

These devices are sensitive to ESD. When handling the module, grounded work area and wrist strap must be used. Always store in an antistatic container with all leads shorted together.

How To Order

Part number example: PH976DBR120CM. Assign optical power from those shown below. Use a three-digit format for all power entries. Call factory for special frequency selection and certification to certain atomic absorption lines. Butterfly package is offered at 50% of output power shown, and is not recommended for spectroscopy applications. See Photodigm’s application note titled “Optical Feedback”

Package Type

(CS) Chip on Submount

(CM) ‘C’ Mount

(T8) TO-8

(BF) Butterfly

Minimum Power (mW)

040 180

080 240

120 280

describe the image C-Mount TO-8 BF