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Low-Crosstalk LD and PD Arrays with Isolated Electrodes for Parallel Optical Communications
Naofumi SUZUKI Kazuhiko SHIBA Takumi TSUKUDA Takahiro NAKAMURA
IEICE TRANSACTIONS on Electronics
Publication Date: 2002/01/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Semiconductor Lasers and Light-Emitting Devices)
electrical crosstalk, LD/PD array, parallel optical communication, isolated electrode,
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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.