Tunable laser oscillator

Details Tunable laser oscillator Tunable laser oscillator

1992-08-26

1994-10-25

Davie, James W.

Coherent light generators

Particular beam control device

Tuning

372 50, 372 96, H01S 310

Patent

active

053596137

ABSTRACT:
A laser oscillator having a laser which produces a laser output signal tuned to a desired frequency as a result of at least two tuning (i.e., frequency control) signals applied to inputs thereof from a control unit. The control unit receives a frequency difference signal which is a measure of the difference between the laser output signal and a reference signal, and uses that frequency difference signal together with present values to derive the tuning signals. The control unit stores a variety of different values for the preset values so that the laser output signal can be tuned to a variety of different desired frequencies. To avoid undesired frequency jumps of the laser output signal due to mode hopping, the control unit assures that the tuning signal will have a predetermined disproportional relationship. The control unit is able to correct the preset values (and the values used therefor) on the basis of the frequency difference signal.

REFERENCES:
patent: 4914666 (1990-04-01), Glance
patent: 4920542 (1990-04-01), Brosson et al.
"Einfugrun In Die Numerische mathematik I" By Josef Stoer, Springer Verlag, ISBN 0-387-05750-1, Chapter 5. (No English Language Translation) (no Date).

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