Passively mode locked-laser and method for generating a pseudo r

Details Passively mode locked-laser and method for generating a pseudo r Passively mode locked-laser and method for generating a pseudo r

1995-01-05

1996-01-30

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Mode locking

372 11, 372 6, 372 25, 372 31, H01S 3098

Patent

active

054886201

ABSTRACT:
A passively mode-locked laser and method for generating a coherent pseudo random pulse train is disclosed. The laser comprises an optical resonant cavity that is capable of sustaining the oscillation of a plurality of resonant modes having respective phases. A saturable absorber is positioned in the resonant cavity and has an optical intensity threshold beyond which multiple mode-locked pulses with random starting times are generated in the resonant cavity and periodically emitted by the laser. A pump injects power into the resonant cavity at a level at which the optical intensity that is incident on the saturable absorber exceeds the optical intensity threshold.

REFERENCES:
patent: 5131069 (1995-03-01), Hall et al.
Lee and Ramaswami, "Study of Pseudo Noise CW diode laser for ranging application", Proceedings of the SPIE: Cooperative Intelligent Robotics in Space 111, vol. 1829, 1992, pp. 36-45 (No Month).
Takeuchi et al., "Random modulation cw lidar", Applied Optics, vol. 22, No. 9, May 1, 1983, pp. 1382-1386.
O'Shea et al., "Introduction to Lasers and Their Application", Addison-Wesley, 1978, pp. 120-123. (No Month).
Hill et al., "Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask", Applied Physics Letters, vol. 62, No. 10, Mar. 8, 1993, pp. 1035-1037.
Keller et al., "Passively mode-Locked ND:YLF and ND:YAG lasers using a new intracavity antiresonant semiconductor Fabry-Perot", OSA Proceedings on Advanced Solid-State Lasers, vol. 13, 1992, pp. 98-100. (No Month).

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