Novel all-electrical scheme for dynamic semiconductor laser-to-fibre coupling control

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Novel all-electrical scheme for dynamic semiconductor laser-to-fibre coupling control

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© The Institution of Electrical Engineers
Published

An all-electrical scheme to maintain the optimum coupling condition in semiconductor laser-to-fibre coupling is described. A small deviation (≪λ) of the optimum laser-to-fibre distance severely degrades the laser performance in terms of, for example, output power, longitudinal mode spectrum and pulse response. The scheme employs the electrical noise of the laser as a distance sensor in a control loop that maintains the optimum laser-to-fibre distance in the presence of thermal or mechanical disturbances.

Inspec keywords: optical couplers; piezoelectric transducers; position control; closed loop systems; optical communication equipment

Other keywords: closed loop systems; distance sensor; optimum coupling distance; mechanical disturbances; longitudinal mode spectrum; dynamic coupling control; output power; pulse response; semiconductor laser-to-fibre coupling; all-electrical scheme; control loop

Subjects: Piezoelectric and ferroelectric devices; Optical communication; Optical waveguides; Optical coherence in homogeneous media; Spatial variables control; Fibre optics; Optical variables control; Self-adjusting control systems; Optical communication devices, equipment and systems; Optical waveguides and couplers

References

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      • C. Wenke , Y. Zhu . Comparison of efficiency and feedback characteristics of techniques for coupling semiconductor lasers to single-mode fibers. Appl. Opt. , 3837 - 3844
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