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Proceedings Paper

Wavelength-tunable duplex integrated light source
Author(s): Hiroshi Okamoto; Hiroshi Yasaka; Kunishige Oe
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Paper Abstract

A monolithically integrated opto-electronic device is proposed as a fast wavelength-switching light source. This tunable duplex integrated light source comprises two wavelength-tunable distributed Bragg reflector (DBR) laser diodes (LDs), two MQW-electro-absorption optical switches, a Y-shaped waveguide coupler, a MQW-electro-absorption modulator, and two thermal drift compensators (TDCs). The wavelength-switching time of the optical switches was estimated to be 60 ps including a 50-ps rise time for the electrical-pulse generator. The wavelength of a 10-Gbit/s NRZ-modulated optical signal can be switched without bit loss. The function of the TDCs is to keep the device-chip temperature constant. Thermal-transient- induced wavelength drift with a millisecond-order time constant, which has been reported for DBR-LDs, and thermal crosstalk between the tuning regions of the integrated LDs, which causes wavelength fluctuation, are effectively suppressed by thermal-drift-compensation operation using the TDCs.

Paper Details

Date Published: 1 April 1996
PDF: 9 pages
Proc. SPIE 2684, High-Speed Semiconductor Laser Sources, (1 April 1996); doi: 10.1117/12.236939
Show Author Affiliations
Hiroshi Okamoto, NTT Optoelectronic Labs. (Japan)
Hiroshi Yasaka, NTT Optoelectronic Labs. (Japan)
Kunishige Oe, NTT Optoelectronic Labs. (Japan)


Published in SPIE Proceedings Vol. 2684:
High-Speed Semiconductor Laser Sources
Paul A. Morton; Deborah L. Crawford, Editor(s)

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