Experimental results of a wideband heterodyne second order optical phase locked loop with 1.5 Â¿m semiconductor lasers are presented. The loop has a bandwidth of 180 MHz, a gain of 181 dBHz and a propagation delay of only 400 ps. A beat signal of 8 MHz linewidth is phase locked to become a replica of a microwave reference source close to carrier with a noise level of Â¿125 dBc/Hz. The total phase variance of the locked carrier is 0.04 rad2 and carriers can be generated in a continuous range from 3 to 18 GHz. The loop reliability is excellent with an average time to cycle slip of 1011 seconds and an acquisition range of 640 MHz.
|Title of host publication||Proceedings of the 22nd European Microwave Conference|
|Publication status||Published - 1992|
|Event||22nd European Microwave Conference - Helsinki, Finland|
Duration: 5 Sep 1992 → 9 Sep 1992
Conference number: 22
|Conference||22nd European Microwave Conference|
|Period||05/09/1992 → 09/09/1992|