Tunable laser oscillator
First Claim
1. A laser oscillator, comprising:
- a laser for producing a laser output signal, said laser having a first control input and at least one additional control input; and
control means for applying a first tuning signal to said first control input and at least one additional tuning signal to said at least one additional control input for tuning said laser output signal to a desired frequency, said first tuning signal and said at least one additional tuning signal having a disproportional relationship.
1 Assignment
0 Petitions
Accused Products
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.
10 Citations
15 Claims
-
1. A laser oscillator, comprising:
-
a laser for producing a laser output signal, said laser having a first control input and at least one additional control input; and control means for applying a first tuning signal to said first control input and at least one additional tuning signal to said at least one additional control input for tuning said laser output signal to a desired frequency, said first tuning signal and said at least one additional tuning signal having a disproportional relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification