[2] Argence B, Chanteau B, Lopez O et al. Quantum cascade laser frequency stabilization at the sub-Hz level[J]. Nature Photonics, 9, 456-460(2015).
[3] Deng X, Liu J, Zang Q et al. Coherent phase transfer via fiber using heterodyne optical phase locking as optical amplification[J]. Applied Optics, 57, 9620-9624(2018).
[4] Zhu T, He Q, Xiao X et al. Modulated pulses based distributed vibration sensing with high frequency response and spatial resolution[J]. Optics Express, 21, 2953-2963(2013).
[7] Okoshi T, Kikuchi K, Nakayama A. Novel method for high resolution measurement of laser output spectrum[J]. Electronics Letters, 16, 630-631(1980).
[10] Richter L, Mandelberg H, Kruger M et al. Linewidth determination from self-heterodyne measurements with subcoherence delay times[J]. IEEE Journal of Quantum Electronics, 22, 2070-2074(1986).
[11] Horak P, Loh W H. On the delayed self-heterodyne interferometric technique for determining the linewidth of fiber lasers[J]. Optics Express, 14, 3923-3928(2006).
[12] Tsuchida H. Simple technique for improving the resolution of the delayed self-heterodyne method[J]. Optics Letters, 15, 640-642(1990).
[13] Chen X P, Han M, Zhu Y Z et al. Implementation of a loss-compensated recirculating delayed self-heterodyne interferometer for ultranarrow laser linewidth measurement[J]. Applied Optics, 45, 7712-7717(2006).
[14] Huang S H, Zhu T, Liu M et al. Precise measurement of ultra-narrow laser linewidths using the strong coherent envelope[J]. Scientific Reports, 7, 41988(2017).
[15] Mercer L B. 1/f frequency noise effects on self-heterodyne linewidth measurements[J]. Journal of Lightwave Technology, 9, 485-493(1991).
[17] Ludvigsen H, Tossavainen M, Kaivola M. Laser linewidth measurements using self-homodyne detection with short delay[J]. Optics Communications, 155, 180-186(1998).
[18] Huang S H, Zhu T, Cao Z Z et al. Laser linewidth measurement based on amplitude difference comparison of coherent envelope[J]. IEEE Photonics Technology Letters, 28, 759-762(2016).
[19] Chen M, Meng Z, Wang J et al. Ultra-narrow linewidth measurement based on Voigt profile fitting[J]. Optics Express, 23, 6803-6808(2015).
[21] Conforti E, Rodigheri M, Sutili T et al. Acoustical and 1/f noises in narrow linewidth lasers[J]. Optics Communications, 476, 126286(2020).
[22] Jiao D D, Gao J, Deng X et al. Sub-Hertz frequency stabilization of 1.55 μm laser on higher order HGmn mode[J]. Optics Communications, 463, 125460(2020).