Abstract-Photonic generation of millimeter and terahertz waves with high phase stability

Dongning Sun, Yi Dong, Lilin Yi, Siwei Wang, Hongxiao Shi, Zongyang Xia, Weilin Xie, and Weisheng Hu  »View Author Affiliations

Optics Letters, Vol. 39, Issue 6, pp. 1493-1496 (2014)
http://dx.doi.org/10.1364/OL.39.001493

http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-39-6-1493

Optical generation of highly stable millimeter and terahertz waves is proposed and experimentally demonstrated. The optical-fiber-path-induced phase fluctuation is identically transferred to a 40 MHz intermediate frequency by using dual-heterodyne phase error transfer, then canceled by a phase-locked loop. Based on the scheme, highly stable signals within the frequency range from 25 GHz to 1 THz are generated, and the phase jitter is decreased from 2.05 rad to 4.7 mrad in the frequency range from 0.01 Hz to 1 MHz. For 1 THz, the residual phase noise reaches −60  dBc/Hz at 1 Hz frequency offset from the carrier, and the relative timing jitter is reduced to 0.7 fs.

© 2014 Optical Society of America