Gain-chip 50mW at 780nm on Carrier     


Gain-chips are critical components for building tunable diode lasers and highly stable external cavity diode lasers. Unlike standard laser diode chips, gain-chips feature deep anti-reflective (AR) coatings on one or both facets, significantly increasing the self-lasing threshold or preventing it. Common external cavity diode laser configurations include Littrow and Littman/Metcalf cavities, where diffraction gratings are used to diffract light of the desired wavelength back along the incident path, with wavelength tuning achieved by rotating the grating. An intracavity lens often collimates the expanded beam onto the grating, and the zero-order beam serves as the laser output.



Product model


Name Model Price
Gain-chip 50mW at 780nm in TO package   [PDF]  [RFQ]

HP-GC-780-1-TO
(Stock NO. Not entered)
[Please inquire]


Parameter



Features

● Optimized for wavelength locked operation in external cavity

● Broad hopping free tuning range

● High SMSR

● No self-lasing up to maximum operating current

● TE polarization

Specifications

Recommended Operating Point

Parameters

Value

Unit

Current

150

mA

Forward voltage

1.8

V

Heatsink temperature

25


Expected Tunability Parameters @ CW, recommended operating point, external cavity in Littman configuration with 200% feedback

Parameter

Value

Unit

Wavelength of maximum power (λmp)

780

nm

Optical output power @ λmp

30

mW

Central wavelength of tuning range

780

nm

Wavelength locking range

30

nm

Chip cavity length

2

mm

Reflectivity of front facet (AR-coated)

<0.001

%

Reflectivity of back facet (HR-coated)

99

%


Absoulute Maximum Ratings

Parameters

Min

Max

Unit

Reverse voltage


1

V

Forward current


300

mA

Storage   temperature range (in original sealed pack)

5

50

Operating temperature range

20

40


Typical Performance Without External Cavity @ CW, 25°C heatsink temperature


L-I-V curve

gain1.jpg.png

ASE spectrum

gain2.jpg.png


Typical Performance Without External Cavity @ CW, 25°C heatsink temperature, Littman configuration with 20% feedback, Thorlabs GR-25-1208 grating

Output power @ 780 nm

gain3.jpg.png

Optical spectrum @ 150mA (res. 0.05 nm)

gain4.jpg.png



Dimension

Unit(mm)

gain5.jpg.png

Application

● External cavity diode lasers

● Tunable laser sources



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