Frequency sweeping phase-locked-loop synthesizer power supply fo

Details Frequency sweeping phase-locked-loop synthesizer power supply fo Frequency sweeping phase-locked-loop synthesizer power supply fo

1991-09-13

1992-09-22

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

372 18, 372 32, 359181, H01S 300

Patent

active

051503727

ABSTRACT:
A phase-locked-loop frequency synthesizer (18) normally applies a radio frequency (RF) drive signal (DRIVE) to a CO.sub.2 waveguide laser (10) at a first frequency which is optimal for continuous laser operation. For lighting the laser (10), a voltage-controlled oscillator (26) of the synthesizer (18) is forced to sweep the frequency of the drive signal (DRIVE) downwardly from a second frequency which is higher than the first frequency, through an intermediate third frequency which is optimal for laser lighting, to the first frequency. The laser (10) is lit during the downward sweep through the third frequency, and thereafter maintained at the first frequency for continuous operation.

REFERENCES:
patent: 3593189 (1971-07-01), Buhrer
patent: 4833681 (1989-05-01), Akiyama et al.
patent: 4893353 (1990-01-01), Iwaoka et al.
patent: 4912526 (1990-03-01), Iwaoka et al.

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