Coherent light generators – Particular beam control device – Modulation
Patent
1997-01-08
1998-10-27
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Modulation
372 6, 372 92, H01S 310
Patent
active
058286829
ABSTRACT:
A modulated cavity including a cavity; a modulation source; and a modulator located with said cavity and in electrical communication with said modulation source. The modulation source overdrives the modulator with a period of modulation T.sub.mod substantially equal to T.sub.roundtrip (n+(p/q)).sup.-1. n, p, and q are integers. T.sub.roundtrip is the period of a pulse making one round-trip in the cavity. In one embodiment of the invention p and q are relatively prime. In another embodiment of the invention the optical response of the modulator includes the qth harmonic of (1/T.sub.mod). In yet another embodiment of the invention p/q is an integer. In still yet another embodiment of the invention p/q is a rational number.
REFERENCES:
patent: 5436925 (1995-07-01), Lin et al.
patent: 5513194 (1996-04-01), Tamura et al.
Onodera, N., et als., "Frequency multiplication in actively mode-locked semiconductor lasers", vol. 62 Appl. Phys. Lett., No. 12 (Mar. 22, 1993).
Yoshida, E., et al., "80.about.200ghz erbium doped fibre laser using a rational harmonic mode-locking technique", vol. 32 Electronic Letters, No. 15 (Jul. 18, 1996).
Jr. Leon Scott
Massachusetts Institute of Technology
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