Low-Crosstalk LD and PD Arrays with Isolated Electrodes for Parallel Optical Communications

Naofumi SUZUKI  Kazuhiko SHIBA  Takumi TSUKUDA  Takahiro NAKAMURA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.1   pp.93-97
Publication Date: 2002/01/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Semiconductor Lasers and Light-Emitting Devices)
Category: 
Keyword: 
electrical crosstalk,  LD/PD array,  parallel optical communication,  isolated electrode,  

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Summary: 
Low-crosstalk 1.3-µm Fabry-Perot laser diode (FP-LD) and photodiode (PD) arrays are developed. The arrays are fabricated on semi-insulating substrates and their anodes and cathodes are separated channel by channel to suppress inter-channel electrical crosstalk at high frequency. Crosstalk of less than -30 dB is achieved between neighboring LDs at 3.125 GHz. This is low enough for BER characteristics observed under asynchronous operation of a 4-channel LD array to be no worse than those under single-channel operation. Excellent uniformity of both LD and PD characteristics, high-temperature operation of the LD array, and low-voltage operation of the PD array are also attained. These arrays are suitable for low-cost high-bit-rate parallel optical communications.