5 papers
Extending the PZT bandwidth of an optical interferometer by suppressing resonance using a high dimensional IIR filter implemented on an FPGA
Masanori Okada, Takahiro Serikawa, James Dannatt +4
This paper considers the application of FPGA-based IIR filtering to increase the usable bandwidth of a piezoelectric transducer used in optical phase locking. We experimentally per…
Generation and measurement of a squeezed vacuum up to 100 MHz at 1550 nm with a semi-monolithic optical parametric oscillator designed towards direct coupling with waveguide modules
Naoto Takanashi, Wataru Inokuchi, Takahiro Serikawa +1
We report generation and measurement of a squeezed vacuum from a semi-monolithic Fabry-Perot optical parametric oscillator (OPO) up to 100 MHz at 1550 nm. The output coupler of the…
Excess Loss in Homodyne Detection Originating from Distributed Photocarrier Generation in Photodiodes
Takahiro Serikawa, Akira Furusawa
The distributed absorption of photons in photodiodes induces an excess noise in continuous-wave photodetection above the transit-time roll-off frequency. We show that it can be tre…
Schrödinger's cat in an optical sideband
Takahiro Serikawa, Jun-ichi Yoshikawa, Shuntaro Takeda +4
We propose a method to subtract a photon from a double sideband mode of continuous-wave light. The central idea is to use phase modulation as a frequency sideband beamsplitter in t…
500MHz resonant photodetector for high-quantum-effciency, low-noise homodyne measurement
Takahiro Serikawa, Akira Furusawa
We design and demonstrate a resonant-type differential photodetector for low-noise quantum homodyne measurement at 500MHz optical sideband with 17MHz of bandwidth. By using a micro…