Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China.
Opt Lett. 2009 Dec 15;34(24):3821-3. doi: 10.1364/OL.34.003821.
The nonlinear dynamics of an optically injected semiconductor laser are explored for radio-over-fiber uplink transmission. Under optical injection locking, the laser at the base station is operated in the period-one oscillation state, where its intensity oscillates at a tunable microwave frequency. When the oscillation is tuned to the subcarrier frequency, it is further locked by the uplink microwave signal. By simply using an ordinary 2.5-Gbps-grade semiconductor laser, uplink transmission of the phase-shift keying (PSK) signal at a subcarrier of 16 GHz with bit-error rate of less than 10(-11) is demonstrated experimentally. Microwave PSK to optical PSK is achieved at the double-locked laser, which allows all-optical demodulation without any high-speed microwave electronics.
研究了光注入半导体激光器的非线性动力学，以用于光纤上行传输中的射频传输。在光注入锁定下，基站中的激光处于周期-1 振荡状态，其强度以可调谐微波频率振荡。当振荡调谐到副载波频率时，它会被上行微波信号进一步锁定。通过简单地使用普通的 2.5-Gbps 级半导体激光器，实验演示了在 16GHz 的副载波上以小于 10(-11)的误码率进行相移键控 (PSK) 信号的上行传输。在双锁定激光器中实现了微波 PSK 到光 PSK 的转换，这允许在没有任何高速微波电子设备的情况下进行全光解调。
