[1] PAINCHAUD Y, POULIN M, MORIN M, et al. Performance of balanceddetection in a coherent receiver［J］.Optics Express, 2009, 17(5): 36593672.

[2] LEE W K, IZADPANAH H, DELFYETT P J. Coherent pulse detection and multichannel coherent detection based on a single balanced homodyne receiver［J］.Optics Express, 2007, 15(5): 20982105.

[3] GHIM Y S, KIM S W. Thinfilm thickness profile and its refractive index measurements by dispersive whitelight interferometry［J］.Optics Express, 2006, 14(24): 1188511891.

[4] PROTOPOPOV V, CHO S, KIM K, et al. Differential heterodyne interferometer for measuring thickness of glass panels［J］.Review of Scientific Instruments, 2007, 78(7): 076101.

[5] PROTOPOPOV V, CHO S, KIM K, et al. Heterodyne doublechannelpolarimeterfor mapping birefringence and thickness of flat glass panels［J］.Review of Scientific Instruments, 2006, 77(5): 053107.

[6] PARK Y, CHO K. Heterodyne interferometer scheme using a double pass in an acoustooptic modulator［J］. Optics Letters, 2011, 36(3): 331333.

[7] CHEN Y L, SU D C. Improved technique for measuring fullfield absolute phases in a commonpath heterodyne interferometer［J］.Applied Optics, 2010, 49(25): 47464750.

[8] ZHAO H Z, LIANG R, LID C, et al. Practical commonpath heterodyne surface profiling interferometer with automatic focusing［J］.Optics& Laser Technology, 2001, 33(4): 259265.

[9] RIZA N A, SHEIKH M, PEREZ F. Optical substrate thickness measurement system using hybrid fiberfreespace optics and selective wavelength interferometry［J］.Optics Communications, 2007, 269(1): 2429.

[10] GAO Long, WANG Chunhui, LI Yanchao. Fibercoupled nearinfrared laser heterodyne interferometry with fast optical scanning［J］. JOSA B, 2010, 27(12): 24992504.