Abstract
Optical pulse energy controlled delay in the propagation time of electrical picosecond pulses in YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) superconducting transmission lines has been investigated by using picosecond optoelectronic techniques. The transmission lines are microstrip lines on LaAlO/sub 3/ substrates and are illuminated by the frequency doubled output (532 nm) of a Nd:YAG laser. The propagation time of picosecond electrical pulses through the transmission lines was measured using electrical autocorrelation techniques with optical switches. By varying the optical pulse energy from 0 to 83 pJ the delay through the lines was tuned by 40 psec at 30 K. The propagation time shows a quadratic dependence on the optical pulse energy. As the optical pulse energy increases a gradual increase in pulse width was observed.
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