976 nm Uncooled mini-DIL Pump Laser

     

Features

  • High Power: up to 200 mW
  • Low Power Dissipation
  • mini-DIL form factor
  • PM fiber

Applications

  • FOG's
  • SDH/Singe Channel EDFA's
  • Small form factor amplifiers
  • Gain Blocks

 

General Description

The EM4 278 single mode, uncooled 976 nm pump lasers simplifies next generation erbium doped fiber amplifier (EDFA) designs by eliminating the need for large, less efficient, and costlier electric supplies.  It is wavelength stabilized by a fiber Bragg grating (FBG) which maintains stable performance over temperature ranges of 10 to 75 °C and power ranges of 50 to 200 mW.

 

The hermetically sealed 8 pin mini-DIL package includes thermistor, monitor photodiode and UniDry™ getter.  The fiber Bragg grating precisely locks the center wavelength over extended power and temperature range.  By eliminating the thermoelectric cooler, next generation EDFA designs, particularly the thermal and control circuitry, benefit from the pump modules smaller size and lower power consumption.

Optical And Electrical Characteristics

TOP=25°C, Tgrating= 23±3 °C and beginning of life unless otherwise specified.

Parameter

Sym.

Condition

Min

Typ.

Max

Unit

Operating Package Temperature

TCHIP

 

10

 

75

°C

External Return Reflection

 

 

 

 

-50

dB

Minimum Operating Power

PMIN

 

50

 

 

mW

Operating Power

POP

 

 

 

200

mW

Threshold Current

ITH

 

 

 

55

mA

Laser Operating Drive Current

IOP

P=POP=200mW

 

500

600

mA

Laser Forward Voltage

VF

I=IMAX

 

 

2.1

V

KINK Power

PKINK

I=IKINK

200

 

 

mW

KINK Current

IKINK

P=PKINK

600

 

 

mA

Center Wavelength

λC

P=POP

975

976

977

nm

Spectral Shift With Temperature

Δλ/ΔT

 

 

 

0.02

nm/°C

Power In Band

 

@lC±1nm, P>50mW

90

 

 

%

Side Mode Suppression

SMSR

P=POP

30

 

 

dB

Monitor Photo Diode Current

IPD

P=POP

0.1

 

6.0

mA

Monitor Photo Diode Dark Current

ID

 

 

 

100

nA

Thermistor Resistance

RTH

T=25°C

9500

10000

10500

 Ω

Thermistor β coefficient

β

0 / 50°C

 

3892