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Coherent delayed self-heterodyne measurement of laser phase noise
SPIE Proceedings, 2011We proposed a novel coherent delayed self-heterodyne technique for laser phase noise measurement. Measurements have been performed for DFB and ECL lasers and compared to self-homodyne using optical coherent receiver to demonstrate the validity of the technique.
Tam N. Huynh, Lim Nguyen, Liam P. Barry
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Optics Letters, 2023
We demonstrate a laser frequency drift measurement system based on the delayed self-heterodyne technique. To ensure long-term measurement validity, an ultra-stable optical fiber delay line is realized by monitoring and locking the transmission delay of a probe signal with a well-designed phase-locked loop.
Langfeng Zhou +3 more
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We demonstrate a laser frequency drift measurement system based on the delayed self-heterodyne technique. To ensure long-term measurement validity, an ultra-stable optical fiber delay line is realized by monitoring and locking the transmission delay of a probe signal with a well-designed phase-locked loop.
Langfeng Zhou +3 more
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Linewidth determination from self-heterodyne measurements with subcoherence delay times
IEEE Journal of Quantum Electronics, 1986The behavior of the power spectrum of an external cavity semiconductor laser has been studied using a delayed self-heterodyne interferometric technique that uses delay times less than the laser's coherence time. Experimental results show that the resulting power spectrum is consistent with the theoretical model.
L. Richter +3 more
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Delayed self-heterodyne linewidth measurement of fiber bragg grating laser
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2004We realized highly stable lasing using a fiber Bragg grating laser. The spectral linewidth measured by delayed self-heterodyne method was less than 1 kHz.
T. Nezu, Y. Tanaka, T. Kurokawa
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A Novel Scheme for Narrow-Linewidth Measurement Based on a Delayed Self-Heterodyne Interferometer
2022 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2022In this work we examine the beat note envelope spectrum generated by a short fiber-based, delayed self-heterodyne structure and we present a novel linewidth measurement scheme suitable for characterizing narrow-linewidth lasers.
Zhongan Zhao +5 more
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Delayed self-heterodyne interferometry using Faraday mirrors in a Michelson configuration
SPIE Proceedings, 2011The use of Faraday rotator mirrors in a Michelson interferometer configuration is shown to significantly improve resolution and coherence for delayed self-heterodyne interferometry.
Mattias L. Åslund +5 more
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Delayed-self-heterodyne measurement of laser frequency fluctuations
Journal of Lightwave Technology, 1991The two-sample (or Allan) variance of frequency fluctuations was used for laser frequency-noise characterization at Fourier frequencies below 1 MHz. The delayed self-heterodyne technique was used for the variance measurement. Analytical calculations ensure that just twice the variance values were observed at tau >
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Delayed Self-Heterodyne Phase Noise Measurements With Coherent Phase Modulation Detection
IEEE Photonics Technology Letters, 2012We present coherent phase modulation detection for laser phase noise measurements with delayed self-heterodyne method. The technique is demonstrated for the first time with the distributed feedback laser and external cavity laser. The results are within 15% of self-homodyne measurements using an optical coherent receiver.
Tam N. Huynh, Lim Nguyen, Liam P. Barry
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Delay self-heterodyne measurement of narrow linewidth laser frequency drift characteristic
Optik, 2014Abstract Resonator integrated optic gyro (RIOG), which employs narrow linewidth laser, is a high-accuracy inertial rotation sensor based on the Sagnac effect. The performance of RIOG is greatly affected by the frequency drift of narrow linewidth laser.
Yinzhou Zhi, Lishuang Feng, Ming Lei
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Laser frequency modulation noise measurement by recirculating delayed self-heterodyne method
Optics Letters, 2011I propose and demonstrate the use of the recirculating delayed self-heterodyne (DSH) method for measuring FM noise power spectral densities (PSDs), which are the most fundamental measure characterizing the spectral purity of laser sources. By analyzing the DSH beat signals with 1, 10, and 160 km delays, the FM noise PSD of a narrow-linewidth fiber ...
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