System for controlling wavelength of laser beam

   
   

The present invention provides a system for controlling a wavelength of laser light comprising: a light-emitting device for outputting laser light; means for regulating a temperature of said light-emitting device; a wavelength monitor for receiving the laser light transmitted from said light-emitting device through an optical filter, said optical filter having a periodic wavelength-transmissivity intensity curve; a controlling unit for providing a control signal to control an current supplied to said temperature regulating means responsive to a output signal from said wavelength monitor; said control signal having a polarity; and means for switching the polarity of said control signal.

A invenção atual fornece um sistema controlando um wavelength de compreender da luz de laser: um dispositivo light-emitting para outputting a luz de laser; meios para regular uma temperatura de dispositivo light-emitting dito; um monitor do wavelength para receber a luz de laser transmitida de dispositivo light-emitting dito através de um filtro ótico, filtro ótico dito que tem uma curva periódica da intensidade do wavelength-wavelength-transmissivity; uma unidade controlando para fornecer um sinal de controle controlar uma corrente forneceu aos meios regulando da temperatura dita responsivos a um sinal de saída de monitor dito do wavelength; sinal de controle dito que tem uma polaridade; e meios para comutar a polaridade de sinal de controle dito.

 
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