1 Introduction
2 Experimental setup
3 Results
3.1 Real-time waveform and the temporal resolution
3.2 The frequency domain observations
3.3 Retrieving the measurement bandwidth
3.4 Comparison of EOS synchronization methods
Parameter | EOS method | |||
---|---|---|---|---|
Fully coherent setup (Jamshidifar and Bolívar 2013) | PLL-synchronized (Jamshidifar et al. 2012) | Open-loop (this work) | Open-loop + post-process (this work) | |
Fundamental frequency (GHz) | 10 | 10 | 19.2 | 19.2 |
Detection bandwidth (GHz) | >300 | <200 | ≈211 | >230 |
Detection bandwidth (%) | 100 | 63–67 | 70 | 77 |
Maximum detected harmonic # | 30 limited by SNR of DUT and shot noise of setup | 20 limited by ps order jitter | 11 limited by μs order jitter | 13 limited by μs order jitter |
Bandwidth (in number of harmonic) | 100% | 63–67% | 37% | 43% |