Integrated coherent transceivers for broadband access networks

Mei-Hao Shih; Fow-Sen Choa; Tawee Tanbun-Ek; Patrick W. Wisk; Won-Tien Tsang; Charles A. Burrus

doi:10.1117/12.264222

22 January 1997 Integrated coherent transceivers for broadband access networks

Mei-Hao Shih, Fow-Sen Choa, Tawee Tanbun-Ek, Patrick W. Wisk, Won-Tien Tsang, Charles A. Burrus

Proceedings Volume 3006, Optoelectronic Integrated Circuits; (1997) https://doi.org/10.1117/12.264222
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

We proposed and demonstrated a simple structure integrated device which can perform both transmitting and receiving functions with very high receiver sensitivity. The device is composed of a tunable distributed-Bragg-reflector (DBR) laser as a local oscillator (LO) and an integrated detector. The incoming signals are mixed with the LO light in the DBR laser cavity. This device can be implemented in a half- duplex or a full-duplex scheme for access networks. In a half-duplex scheme, the detector section can be negatively biased to receive the downstream signals and can be positively biased to pass the upstream signals transmitted by the DBR laser. In a full-duplex scheme, partial of the LO power is used to transmit upstream data. An external modulator is needed for the device to transmit and receive data simultaneously. AN FSK receiver sensitivity of minus 43.4 dBm at 108 Mb/s was obtained. This device is carefully designed that only one Fabry-Perot (FP) cavity mode is inside the grating stop band. Otherwise the available bandwidth will be limited to one FP mode spacing if the incoming signals see more than one mode inside the cavity. Our device can fully utilize the wavelength tuning range of a tunable DBR laser to achieve large scale densely spaced WDM coherent systems.

Citation Download Citation

Mei-Hao Shih, Fow-Sen Choa, Tawee Tanbun-Ek, Patrick W. Wisk, Won-Tien Tsang, and Charles A. Burrus "Integrated coherent transceivers for broadband access networks", Proc. SPIE 3006, Optoelectronic Integrated Circuits, (22 January 1997); https://doi.org/10.1117/12.264222

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