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Optical coupling characteristics of laser diodes to thermally diffused expanded core fiber coupling using an aspheric lens

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4 Author(s)
Kato, K. ; NTT Opto-Electron. Lab., Ibaraki, Japan ; Nishi, I. ; Yoshino, K. ; Hanafusa, H.

A discussion is presented of the optical coupling characteristics of a 1.3 mu m laser diode to a thermally diffused expanded core (TEC) single-mode fiber coupling using an aspheric lens. The misalignment tolerance width for a 0.5 dB loss increment of the expanded core fiber was enlarged to 8.4 mu m from 1.9 mu m of a nonexpanded core fiber without a remarkable coupling-loss increase. The TEC fibers will make the LD module assembly easier, and reduce the assembly cost.<>

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Photonics Technology Letters, IEEE  (Volume:3 ,  Issue: 5 )