Zhuang Jin, Jing Li, Menghua Jiang, Youqiang Liu, Wenbin Qin, Yinhua Cao, Zhiyong Wang. Influence of output mirror free external cavity spectral beam combining structure on feedback efficiency[J]. Infrared and Laser Engineering, 2023, 52(3): 20220446
- Infrared and Laser Engineering
- Vol. 52, Issue 3, 20220446 (2023)
Fig. 1. Structure of diagram external cavity spectral beam combining without output coupler
Fig. 2. Equivalent resonator of the external cavity spectral beam combining structure without output coupler
Fig. 3. (a) Feedback spot of the 0th-order diffracted beam; (b) Feedback spot of the 1st-order diffracted beam; (c) Schematic diagram of the feedback of the 0th-order and 1st-order diffracted beams
Fig. 4. (a) Influence of the feedback power and feedback radiation intensity on the distance of the HR2; (b) Influence of the size of the slow axis of the combined beam spot on the distance of the HR2
Fig. 5. Variation of the feedback beam intensity distribution with the distance of the HR2
Fig. 6. Diffracted beam feedback. (a) Correct beam feedback; (b) Incorrect beam feedback
Fig. 7. Telescope diaphragm filter system in Zemax
Fig. 8. Variation of feedback power and combined slow-axis beam size with different multiple telescope systems
Fig. 9. Feedback reduction and misalignment caused by the "Smile" effect (fast axis direction)
Fig. 10. Feedback beam intensity distribution and combined beam spot as a function of severity of "Smile" effect
Fig. 11. Influence of "Smile" effect degree on feedback power and combined beam spot radius
Fig. 12. (a) Corrected feedback beam of fast-axis telescope system; (b) Corrected feedback beam and combined beam spot
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