Coherent light generators – Particular beam control device – Mode locking
Patent
1990-03-14
1991-03-12
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Mode locking
372 25, 372 29, 372 54, 372 32, H01S 3098
Patent
active
049998404
ABSTRACT:
A length stabilized, dispersion compensated synchronously pumped mode locked dye laser is disclosed. The output of the dye laser is actively stabilized by monitoring the output power thereof and generating an error signal for actively adjusting the cavity length. The operation is enhanced by actively controlling the power of the pump pulses exciting the dye laser so that the power fluctuations in the dye laser are due primarily to fluctuations in cavity length. Stability is also enhanced by operating the cavity with a negative group velocity dispersion. The resultant lengthening of the output pulses is compensated by a pulse compressor, located outside of the cavity, which adds a positive group velocity dispersion to upchirp and shorten the pulses.
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Mitschke & Mollenauer "Stabilizing the Soliton Laser", IEEE Journal of Quantum Electronics, vol. QE22, No. 12 12/86.
Dawson & Maxson "Cavity-Length Detuning Effects and Stabilization of a Synchronously Pumped Femtosecond Linear Dye Laser", Optics Letters, vol. 13, p. 126, 2/88.
Valdmanis & Fork, "Design Considerations for a Femtosecond Pulse Laser Balancing Self Phase Modulation, Group Velocity Dispersion, Saturable Absorption and Saturable Gain", IEEE Journal of Quantum Electronics, vol. QE22, No. 1, 1/86.
Fork, et al., "Negative Dispersion Using Pairs of Prisms", Optics Letters, vol. 9, 5/84.
Coherent Inc.
Jr. Leon Scott
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