Temperature stabilization of injection lasers

Patent · Tue Jul 28 04:00:00 EDT 1987

OSTI ID:6084125

Albanese, A

This patent describes circuitry for stabilizing the ambient temperature of an injection laser, the injection laser having a two-terminal equivalent circuit comprising: a parallel combination of an ideal lasing diode and a zener diode, in series with a bias diode and a resistor. The circuitry consists of: means, in electrical energy transfer relation with the injection laser, for generating a compensation voltage matching a sum of the voltages developed across the resistor and the bias diode of the laser, means for continuously monitoring a voltage across the two terminals of the injection laser to produce a monitored voltage indicative of the ambient temperature of the lasing diode, means for deriving from the compensation voltage and the monitored voltage a derived voltage corresponding to a voltage developed across the lasing diode of the laser, and means for adjusting the ambient temperature of the injection laser to stabilize the laser wavelength in response to the derived voltage.

• Assignee: Bell Communications Research, Inc., Livingston, NJ
• Patent Number(s): US 4683573
• OSTI ID: 6084125
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMBIENT TEMPERATURE
CONTROL
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EQUIVALENT CIRCUITS
JUNCTION DIODES
LASERS
MONITORING
RESISTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
SEMICONDUCTOR LASERS
SEMICONDUCTOR RESISTORS
TEMPERATURE CONTROL
WAVELENGTHS