Hybrid type passively and actively mode-locked laser scheme

Details Hybrid type passively and actively mode-locked laser scheme Hybrid type passively and actively mode-locked laser scheme

1996-09-13

1998-10-27

Bovernick, Rodney B.

Coherent light generators

Particular beam control device

Mode locking

372 25, 372 6, 372 22, 372 94, 372700, H01S 3098, H01S 310, H01S 330, H01S 3083

Patent

active

058286802

ABSTRACT:
A hybrid type passively and actively mode-locked laser scheme is disclosed, in which not only the capability of producing ultra-short optical pulses by the conventional passively mode-locked optical fiber laser scheme is utilized, but also the repetition rate variation capability and the optical pulse synchronization capability of the conventional actively mode-locked laser scheme are utilized. Consequently, all the advantages of the two conventional laser schemes are obtained in the present invention. Specifically, two loops are coupled together, and one of the two loops consists of a non-linear amplifying loop of the existing passively mode-locked scheme, while the other loop includes an optical modulator and an optical gain medium for the loop to perform the function of an actively mode-locked scheme. Further the other loop includes a time delay line so as to adjust the laser oscillation repetition rate. The ultra-short optical pulses of the present invention will be applied to high speed time division multiplexed optical communication system, high speed optical signal processors, and ultrafast optical phenomenon studies.

REFERENCES:
patent: 5212711 (1993-05-01), Harvey et al.
Nakazawa et al, "Generation of 98fs Optical Pulses Directly from an Erbium-doped Fibre Ring Laser at 1.57 um", Electronic Letters, vol. 29, No. 1, pp. 63-65, Jan. 1993.

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