Wavelength stabilizing apparatus of laser light source

Details Wavelength stabilizing apparatus of laser light source Wavelength stabilizing apparatus of laser light source

1998-01-21

2000-07-25

Bovernick, Rodney

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, H01S 313

Patent

active

060944463

ABSTRACT:
The light emitted by the laser diode 1 is put into an interference optical filter 5. The light passing through the interference optical filter 5 and the reflected light are respectively received in photo diodes PD1, PD2. Their output ratio is calculated by an adder 13, a subtracter 14, and a divider 15, and a wavelength signal is obtained. The difference of the output ratio and reference value is detected as error signal by an error detector 16, and the emission wavelength of the laser diode 1 is controlled so that the error signal may be zero.

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