Laser transmitter including an external optical resonator

Coherent light generators – Particular resonant cavity – Plural cavities

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372 6, 372108, 350 9615, 350 9617, 350 9633, H01S 3082, G02B 622, G02B 626

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active

047992344

ABSTRACT:
A narrow-band laser transmitter including a semiconductor laser and an external optical resonator in the form of a wavelength-selective fiber directional coupler. A partially reflecting feedback device is provided so that output power of the transmitter can be taken from the resonator. The frequency selective fiber directional coupler is formed by a dispersive double core fiber and the feedback device is supplied with radiant laser energy that is coupled over from one core into the other core and that portion of the radiant energy which has been coupled over is allowed to pass as output power of the transmitter by the feedback device.

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