A two-stage Mach-Zehnder modulator can generate power-efficient AM/PM sidebands for detuned signal recycling, but its current displacement noise exceeds the requirement for KAGRA.
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Design and experimental demonstration of a laser modulation system for future gravitational-wave detectors
A two-stage Mach-Zehnder modulator can generate power-efficient AM/PM sidebands for detuned signal recycling, but its current displacement noise exceeds the requirement for KAGRA.