Abstract
Several optical techniques that are often employed to generate mid-IR pulses are discussed. These are based on a difference frequency generation (DFG) process for mixing signal and idler pulses generated from optical parametric oscillators that are synchronously pumped by Ti:Sapphire laser. Here, we proposed a new optical scheme that improves the day-to-day operation stability and the ease of manoeuvring spectrum anywhere in the 2 to 10 μm range. The demonstrated scheme is very compact and cost-effective, and we believe this optical scheme will be helpful for researchers working with mid-IR pulses.
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Acknowledgements
The authors acknowledge the financial support from DST-SERB (EMR\({/ }\)000546, EMR\({/ }\)000516), DST-Purse, Respond Project ISRO and UoH Institute of Eminence (IoE) Grant RC1-20-011. Vinod K Rajput acknowledges a fellowship from the Indian Space Research Organisation (ISRO) (Grant No. ISRO\({/ }\)RES\({/ }\)3\({/ }\)799), India for the financial support. Prasenjit Jana acknowledges the PMRF (Prime Minister Research Fellowship) funding.
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Rajput, V.K., Jana, P., Ponnan, S. et al. Compact optical scheme for the generation of ultrafast mid-IR laser pulses. Pramana - J Phys 96, 198 (2022). https://doi.org/10.1007/s12043-022-02426-8
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DOI: https://doi.org/10.1007/s12043-022-02426-8
Keywords
- Silver thiogallate crystal (AgGaS2 or AGS)
- optical parametric amplifier
- signal and idler difference frequency mixing
- mid-IR generation
- collinear difference frequency generation mixing