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Journals and Conferences
All-optical sampling is experimentally demonstrated using cross-absorption modulation in an electroabsorption modulator. A clear eye opening with 7-ps temporal resolution was obtained by optimizing… (More)
An all-optical sampling-based Q-factor monitor applicable to multi-bitrated and formatted signals was successfully demonstrated in a network testbed. Quality of GMPLS lightpaths could be diagnosed… (More)
We developed an optical gating device using a bulk layer and high mesa ridge/BH hybrid structure with input power of 14.5 dBm. The shortest gating width of 3.9 ps was obtained in all-optical sampling… (More)
Double-pulse pumping improves the temporal resolution of cost-effective all-optical sampling using an electroabsorption modulator. A shortened sampling gate width was demonstrated using two… (More)
An optical sampling oscilloscope with SFG conversion efficiency as high as 15 times that of KTP, while simultaneously covering both the C and L bands, is demonstrated for the first time.
Rapid progress in millimeter-wave wireless communication technologies requires accurate spectrum analysis in the frequency domain over 100 GHz. A tunable preselection filter is a key device in… (More)
Analysis and measurement of radio signals above 60 GHz requires connection of an external mixer to a commercial spectrum analyzer. In this setup, in addition to the actual frequency components,… (More)
We developed a new pattern measurement method to observe signals of any bit length. We successfully measured an ultra-long-pattern PRBS 233-1 160-Gb/s RZ optical signal for the first time.
Variable gate width, all-optical sampling using an electroabsorption modulator is proposed for a multi-bit rate, optical performance monitor. The discrepancy between waveform quality and bit error… (More)
The recent start of R&D into Wireless Personal Networks (WPAN) and millimeter-wave wireless systems is creating an urgent need for development of a spectrum analyzer supporting accurate measurements… (More)