Wavelength-tunable duplex integrated light source

Hiroshi Okamoto; Hiroshi Yasaka; Kunishige Oe

doi:10.1117/12.236939

1 April 1996 Wavelength-tunable duplex integrated light source

Hiroshi Okamoto, Hiroshi Yasaka, Kunishige Oe

Proceedings Volume 2684, High-Speed Semiconductor Laser Sources; (1996) https://doi.org/10.1117/12.236939
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Hiroshi Okamoto, Hiroshi Yasaka, and Kunishige Oe "Wavelength-tunable duplex integrated light source", Proc. SPIE 2684, High-Speed Semiconductor Laser Sources, (1 April 1996); https://doi.org/10.1117/12.236939

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KEYWORDS

Light sources

Switching

Modulators

Optical switching

Wavelength tuning

Thermal effects

Waveguides

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