Fig. 1. Schematic of space-based gravitational wave detector constellations^［13］

Fig. 2. Schematic of low-noise MOPA laser

Fig. 3. Schematic of NPRO

Fig. 4. HSL prototype for NGGM at NPL laboratories

Fig. 5. Delivered m-NPRO packages and photo of the baseline fiber amplifier

Fig. 6. RIN and frequency noise of fiber laser and NPRO

Fig. 7. RIN and frequency noise of PW-ECL and NPRO

Fig. 8. Schematic layout and photograph of the micro-integrated PW-ECL

Fig. 9. The first prototype of a laser for LISA

Fig. 10. Schematic diagram of I₂-stabilized laser for DECIGO

Fig. 11. Schematic diagram of fiber amplifier for DECIGO

Fig. 12. DBR laser head and schematic of the internal structure for Tianqin-1 mission

Fig. 13. Principle diagram of laser source for Taiji-1 satellite

Fig. 14. Schematic of suppressing the intensity noise based on optoelectronic feedback control

Fig. 15. Schematic of the experimental setup and measurement of the RPN

Fig. 16. Low-noise laser developed by Tsinghua University

Fig. 17. Schematic of the PDH laser frequency stabilization

Fig. 18. Frequency noise spectral density between the PDH and the molecular iodine