As electronic signals move to higher frequencies and wider bandwidths, there is need for new methods of measuring these bandwidths, there is need for new methods of measuring these high frequency/high speed (tens of Hgz and or high bit rate (tens of GBs and/or high bit rate(tens of GBs/s signals. In this work, critical technical issues associated with the design of a rugged, compact, real-time sampling system using photo conductive switches as the test signal generator and sampler were investigated. The design concept is based upon an optoelectronic equivalent time sampling principle and optical microwave signal mixing. It involves first phase locking of the periodic input signal to be measured to the periodic optical pulses from a mode-locked laser and subsequent sampling of the locked signal by the optical pulses. A photoconductive switch is used for the optical microwave mixer and another photoconductor for the sampler.
Proceedings Title: Tech. Dig., Conf. on Lasers and Electro-Optics (CLEO)
Conference Dates: May 7-12, 2000
Conference Location: San Francisco, CA
Pub Type: Conferences
electronic delay, optical-microwave mixing , optical-microwave phase-locked loop, photoconductive sampling