Red laser based on intra-cavity Nd:YAG/CH4 frequency doubled Raman lasers

Yanchao Wang; Pengyuan Wang; Jinbo Liu; Wanfa Liu; Jingwei Guo

doi:10.1117/12.2257634

13 January 2017 Red laser based on intra-cavity Nd:YAG/CH₄ frequency doubled Raman lasers

Yanchao Wang, Pengyuan Wang, Jinbo Liu, Wanfa Liu, Jingwei Guo

Proceedings Volume 10254, XXI International Symposium on High Power Laser Systems and Applications 2016; 102540D (2017) https://doi.org/10.1117/12.2257634
Event: XXI International Symposium on High Power Laser Systems and Applications, 2016, Gmunden, Austria

Abstract

Stimulated Raman scattering (SRS) is a powerful tool for the extension of the spectral range of lasers. To obtain efficient Raman conversion in SRS, many researchers have studied different types of Raman laser configurations. Among these configurations, the intra-cavity type is particularly attractive. Intra-cavity SRS has the advantages of high intra-cavity laser intensity, low-SRS threshold, and high Raman conversion efficiency. In this paper, An Q-switched intra-cavity Nd: YAG/CH₄ frequency-doubled Raman lasers is reported. A negative branch confocal resonator with M= 1.25 is used for the frequency-doubling of Nd: YAG laser. The consequent 532nm light is confined in intra- cavity SRS with travelling wave resonator, and the focal of one mirror of cavity is overlap with the center of the other mirror of the cavity. We found this design is especially efficient to reduce the threshold of SRS, and increase conversion efficiency. The threshold is measured to be 0.62 MW, and at the pump energy of 16.1 mJ, the conversion efficiency is 34%. With the smaller magnification M, the threshold could further decrease, and the conversion efficiency could be improved further. This is a successful try to extend the spectral range of a laser to the shorter wavelength by SRS, and this design may play an important role in the fulfillment of high power red lasers.

Citation Download Citation

Yanchao Wang, Pengyuan Wang, Jinbo Liu, Wanfa Liu, and Jingwei Guo "Red laser based on intra-cavity Nd:YAG/CH₄ frequency doubled Raman lasers", Proc. SPIE 10254, XXI International Symposium on High Power Laser Systems and Applications 2016, 102540D (13 January 2017); https://doi.org/10.1117/12.2257634

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available