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Some of terahertz detectors such as high temperature superconducting (HTS) YBa2Cu2Ox (YBCO) Josephson junction mixer are suffering from impedance mismatching problem with antenna where the junction impedance barely reaches several ohms. This paper presents two impedance matching methods based on impedance-wideband bow-tie antennas. First, a quarter of wavelength impedance matching network is proposed...
471-fs pulses are generated by injecting a 33-ps pulse train, obtained from pulse carving a 1.55-mum CW DFB laser, into a time-lens loop. High repetition rate of 1.1 GHz is demonstrated.
436-fs Pulses are generated by injecting a 33-ps pulse train, obtained from pulse carving a 1.55-mum CW DFB laser, into a time-lens loop. Largely-tunable repetition rate from 23 MHz to 400 MHz is demonstrated.
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