Optical arrangement for a feedback-free coupling of a laser emis

Details Optical arrangement for a feedback-free coupling of a laser emis Optical arrangement for a feedback-free coupling of a laser emis

1990-09-06

1991-11-19

Sikes, William L.

Optical waveguides

With optical coupler

Input/output coupler

385 31, G02B 636

Patent

active

050660926

ABSTRACT:
An optical arrangement for the feedback-free coupling of the laser emission emitted by a semiconductor laser into an optical fiber, characterized by a first optical lens for receiving the output of the semiconductor laser, a first optical isolator composed of a Faraday rotator and a polarizer following in the propagation direction of the laser emission, a second optical isolator being composed of a second Faraday rotator and a second polarizer that has a higher blocking attenuation compared to the blocking attenuation of the first polarizer being arranged between the first lens and the optical isolator. In order to use the optical arrangement in an optical heterodyne system, the blocking attenuation of at least -70 dB is obtainable in this arrangement.

REFERENCES:
patent: 4475788 (1984-10-01), Tomassini et al.
patent: 4705351 (1987-11-01), Toda
patent: 4753521 (1988-06-01), Deserno
patent: 4767171 (1988-08-01), Keil et al.
patent: 4966444 (1990-10-01), Droegemueller et al.
Tkach et al., "Linewidth Broadening and Mode Splitting Due to Weak Feedback in Single-Frequency 1.5-.mu.m Lasers", Conf. on Fiber Comm. (OFC) '86, Atlanta, M15, pp. 18, 19.
Shirasaki et al., "Optical Isolator for Single Mode Fiber", European Conference on Optical Communications (ECOC), '86, Barcelona, 1986, vol. II, pp. 11-16.
Chikama et al., "An Optical FSK Transmission Experiment Using Solitary DFB Lasers for Broad-Band Distribution Networks", European Conference on Optical Communications (ECOC) '87, vol. 1, pp. 349-352.
Drogemuller "A Novel Compact Optical Isolator for Laser-to-Fiber Coupling with Low Optical Feedback", European Conference on Optical Communications (ECOC) '87, vol. I, pp. 271-274.
Tkach et al., "Regimes of Feedback Effects in 1.5-.mu.m Distributed Feedback Lasers", Journal of Lightwave Technology, vol. LT-4, No. 11, Nov. 1986, pp. 1655-1661.
Kawano et al., "A New Confocal Combination Lens Method for a Laser-Diode Module Using a Single-Mode Fiber", Journal of Lightwave Technology, vol. LT-3, No. 4, Aug. 1985, pp. 739-745.

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