[3] [3] L. E. Richter, H. I. Mandelberg, M. S. Kruger et al.. Linewidth determination from self-heterodyne measurements with subcoherence delay times[J]. IEEE J. Quantum Electron., 1986, QE-22(11): 2070～2074

[5] [5] Park Namkyoo, Jay W. Dawson, Kerry J. Vahala. An improved delayed self-heterodyne interferometer for linewidth measurements[J]. IEEE Photon. Technol. Lett., 1992, 4(9): 1063～1066

[7] [7] Linden B. Mercer. 1/f frequency noise effects on self-Heterodyne linewidth measurements[J]. J. Lightwave Technology, 1991, 9(4): 485～493

[8] [8] Xiaopei Chen, Ming Han, Yizheng Zhu et al.. Implementation of a loss-compensated recirculating delayed self-heterodyne interferometer for ultranarrow laser linewidth measurement[J]. Appl. Opt., 2006, 45(29): 7712～7717

[9] [9] Makoto Murakami, Shigeru Saito. Evolution of field spectrum due to fiber-nonlinearity-induced phase noise in in-line optical amplifier systems[J]. IEEE Photon. Technol. Lett., 1991, 4(11): 1269～1272