H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 5/02 (2006.01) H01S 5/024 (2006.01)
Patent
CA 2351260
The invention provides a semiconductor laser module which can suppress overcurrent flowing into a thermo-module, wherein the thermo-module (5) carries out a heating action when a reverse current flows from lead pin (16f) through lead pin (16a), and contrarily carries out a cooling action when a current flows from the lead pin (16a) through the lead pin (16f). An overcurrent limiting means (20) is provided, which can suppress overcurrent flowing into the thermo-module (5) in its heating direction. The overcurrent limiting circuit (20) is provided with a bypass line (21), a resistor (22), and a diode (23). When a current flows in the heating direction, the diode (23) is turned on, whereby the current is shunted to the thermo-module (5) and bypass line (21) for flow, and accordingly, the overcurrent flowing into the thermo-module (5) can be effectively suppressed.
L'invention porte sur un module laser à semi-conducteurs qui réduit les surintensités de courant dans un module thermoélectrique. Dans un module (5) thermoélectrique, un courant inverse allant d'une broche conductrice (16f) à une autre (16a) génère une chaleur thermoélectrique alors qu'un courant allant de la broche conductrice (16a) à l'autre broche conductrice (16f) génère un refroidissement thermoélectrique. Un dispositif de protection (20) contre les surintensités permet de réduire les surintensités pour le chauffage et comprend une dérivation (21), une résistance (22) et une diode (23). Pour chauffer, la diode (23) se met en marche et détourne une partie du courant vers la dérivation (21), ce qui réduit les surintensités dans le module (5) thermoélectrique.
Aikiyo Takeshi
Furuhashi Chihomi
Koseki Takashi
Freedman & Associates
The Furukawa Electric Co. Ltd.
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