Large-Tolerant Direct Coupling to an SMF Array With a Lens-Integrated Surface-Emitting Laser

As a solution to provide a small-size and low-cost 100-Gb/s optical module, direct optical coupling between a lens-integrated surface-emitting DFB laser (LISEL) array and a single-mode fiber (SMF) array is demonstrated. A very-small far-field angle (~2°) was obtained by monolithic integration of an...

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Veröffentlicht in:	IEEE photonics technology letters 2015-05, Vol.27 (9), p.939-942
Hauptverfasser:	Adachi, Koichiro, Takei, Aki, Suzuki, Takanori, Tanaka, Shigehisa, Nakanishi, Akira, Naoe, Kazuhiko
Format:	Artikel
Sprache:	eng
Schlagworte:	Arrays Couplings Fiber lasers integrated optics Lenses Loss measurement Optical coupling optical interconnects Surface emitting lasers Surface-emitting laser
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container_end_page	942
container_issue	9
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container_title	IEEE photonics technology letters
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creator	Adachi, Koichiro Takei, Aki Suzuki, Takanori Tanaka, Shigehisa Nakanishi, Akira Naoe, Kazuhiko
description	As a solution to provide a small-size and low-cost 100-Gb/s optical module, direct optical coupling between a lens-integrated surface-emitting DFB laser (LISEL) array and a single-mode fiber (SMF) array is demonstrated. A very-small far-field angle (~2°) was obtained by monolithic integration of an InP lens with a laser chip. As a result, each channel of the LISEL array can directly couple to an SMF without any additional external optical components. The measured misalignment tolerance between the LISEL array and an SMF array was sufficiently large, namely, ±5.5 μm, at excess loss of 1 dB over all four channels with the maximum coupling efficiency of 8.4 dB. These measurement results are in good agreement with a theoretical calculation based on Gaussian optics. These results demonstrate that high coupling efficiency (-3 dB) can be achieved while large misalignment tolerance (±4.5 μm) at excess loss of only 1 dB is maintained.
doi_str_mv	10.1109/LPT.2015.2399922
format	Article
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subjects	Arrays Couplings Fiber lasers integrated optics Lenses Loss measurement Optical coupling optical interconnects Surface emitting lasers Surface-emitting laser
title	Large-Tolerant Direct Coupling to an SMF Array With a Lens-Integrated Surface-Emitting Laser
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