Short optical pulse generator having a looped directional couple

Details Short optical pulse generator having a looped directional couple Short optical pulse generator having a looped directional couple

1988-12-20

1990-02-27

Sikes, William L.

Coherent light generators

Particular component circuitry

Optical pumping

350 9617, 350 9616, 372 6, 372 18, 372 94, G02B 626, H01S 3098, H01S 3083

Patent

active

049040413

ABSTRACT:
A short optical pulse generator is disclosed in which the optical radiation from a driven laser diode (101) is coupled to an external cavity which includes a looped directional coupler (104, 120) which reflects a portion of the optical radiation back to the laser causing the laser to mode-lock and produce an output which consists of a stream of very short high repetition optical pulses. By changing the length of the loop (107), the repetition rate of the pulse stream can be varied and by adjusting the coupling coefficient of the coupler either mechanically or electrooptically, the pulse width and pulse height parameters of the pulse stream can be varied.

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