Coherent light generators – Particular beam control device – Optical output stabilization
Patent
1993-06-15
1994-11-22
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Optical output stabilization
372 18, 372 25, 372 38, 372 32, H01S 3098
Patent
active
053675290
ABSTRACT:
Phase-locking means are provided for synchronizing the pulse timing of two (or more) passively mode-locked pulsed lasers. The phase-locking is carried out at a frequency much higher than that of the fundamental repetition rate of the lasers because it results in much higher sensitivity. The signal from the two bandpass filters is applied to a phase detector. A phase-locked loop circuit ("PLL") is employed to generate an error signal which is applied to a piezoelectric transducer ("PZT") attached to a mirror in one of the laser cavities. Corrections in the position of the mirror driven by the error signal help reduce the effects of phase noise in the relative fundamental repetition frequencies of the two lasers so that they are effectively synchronized with one another with a "jitter" of less than 1 ps.
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Holsinger Kevin K.
Wright David L.
Bovernick Rodney B.
McNutt Robert
Spectra--Physics Lasers, Inc.
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