Widely tunable cavity-enhanced backward difference-frequency generation
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909852692905984 |
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| author | Gao, Ming-Yuan Song, Yue-Wei Chen, Ren-Hui Li, Yin-Hai Zhou, Zhi-Yuan Shi, Bao-Sen |
| author_facet | Gao, Ming-Yuan Song, Yue-Wei Chen, Ren-Hui Li, Yin-Hai Zhou, Zhi-Yuan Shi, Bao-Sen |
| contents | Difference-frequency generation (DFG) is a powerful technique for generating widely tunable infrared radiation. However, conventional phase-matching schemes may require tuning multiple parameters-such as the wavelengths, crystal temperature, crystal angle, and poling period-to achieve wide tunability, which increases the complexity of practical operation. In this work, we employ a backward quasi-phase-matching scheme with distinctive tuning characteristics and demonstrate pump-enhanced continuous-wave DFG output tunable from 1751 nm to 2451 nm (700 nm range) in a bulk crystal. The tuning is achieved solely by varying the pump wavelength and the signal wavelength (less than 5 nm), enabling continuous, rapid, and room-temperature operation. The tuning characteristics, power-scaling behavior, and output stability are experimentally verified with the idler wavelength set at 2000 nm. The approach offers a new paradigm for widely tunable infrared radiation generation and holds promise for applications in spectroscopy and biomedical sensing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_15539 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Widely tunable cavity-enhanced backward difference-frequency generation Gao, Ming-Yuan Song, Yue-Wei Chen, Ren-Hui Li, Yin-Hai Zhou, Zhi-Yuan Shi, Bao-Sen Optics Difference-frequency generation (DFG) is a powerful technique for generating widely tunable infrared radiation. However, conventional phase-matching schemes may require tuning multiple parameters-such as the wavelengths, crystal temperature, crystal angle, and poling period-to achieve wide tunability, which increases the complexity of practical operation. In this work, we employ a backward quasi-phase-matching scheme with distinctive tuning characteristics and demonstrate pump-enhanced continuous-wave DFG output tunable from 1751 nm to 2451 nm (700 nm range) in a bulk crystal. The tuning is achieved solely by varying the pump wavelength and the signal wavelength (less than 5 nm), enabling continuous, rapid, and room-temperature operation. The tuning characteristics, power-scaling behavior, and output stability are experimentally verified with the idler wavelength set at 2000 nm. The approach offers a new paradigm for widely tunable infrared radiation generation and holds promise for applications in spectroscopy and biomedical sensing. |
| title | Widely tunable cavity-enhanced backward difference-frequency generation |
| topic | Optics |
| url | https://arxiv.org/abs/2510.15539 |