Fig. 1. Wavefront propagation in field

Fig. 2. Three kinds of grating pair dispersion compensation system. (a) Double-grating one-way compensation system; (b) double-grating two-way compensation system; (c) four-grating one-way compensation system

Fig. 3. Optical path diagram of grating pair compressor

Fig. 4. Physical diagram of autocorrelator

Fig. 5. Autocorrelation trace after laser connecting with 4 m long single-mode polarization maintaining fiber

Fig. 6. Influence of different grating pair spacing on dispersion

Fig. 7. Influence of different incident angles of light on dispersion

Fig. 8. Variation trends of second-order dispersion and third-order dispersion of grating with grating constant of 1200 mm^-1 in 1500-1600 nm band

Fig. 9. Experimental system construction and test results. (a) Optical path of system; (b) Autocorrelation traces before and after compensation