Output control apparatus of laser unit and adjusting method ther

Details Output control apparatus of laser unit and adjusting method ther Output control apparatus of laser unit and adjusting method ther

1991-06-13

1992-08-18

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 38, H01S 313

Patent

active

051406012

ABSTRACT:
An output control apparatus for controlling emission power of a laser unit includes: a monitor circuit for generating a first monitor signal corresponding to the emission power of the laser unit; a monitor signal amplifier for amplifying the first monitor signal and for outputting a second monitor signal, the monitor signal amplifier having a trimable resistor for adjusting a gain; and a control circuit for controlling the emission power of the laser unit based on the second monitor means so that the emission power of the laser unit is maintained at a predetermined power level. A method for adjusting the above output control apparatus includes the following steps (a) and (b) of: (a) maintaining the emission power of the laser unit at a predetermined power level; and (b) carrying out a trimming of the trimable resistor so that the second monitor signal becomes a predetermined value while the step (a) is being carried out. Thus, the gain of the monitor signal amplifier is adjusted so that the emission power having the predetermined power level is obtained when the second monitor signal is equal to the predetermined value.

REFERENCES:
patent: 4856008 (1989-08-01), Senma et al.
patent: 4926433 (1990-05-01), Imamura et al.

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