Share Email Print
cover

Proceedings Paper

149.8 nm, the shortest wavelength generated by phase matching in nonlinear crystals
Author(s): Tomoharu Nakazato; Isao Ito; Yohei Kobayashi; Xiaoyang Wang; Chuangtian Chen; Shuntaro Watanabe
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Narrow band light sources in the vacuum ultraviolet (VUV) region are attractive for photo lithography and high resolution photoelectron spectroscopy. Phase matching is essential to generate high power VUV lights by using a narrow band, low peak intensity and nanosecond pump source. In this research, sum frequency mixing has been demonstrated below 150 nm in KBe2BO3F2 by using the fundamental with its fourth harmonic of a 6 kHz Ti:sapphire laser. The laser system we have developed in this research, consists of a Ti:sapphire laser system and a frequency conversion stage. We generated 149.8-nm radiation, which is the shortest wavelength ever obtained to our knowledge by phase matching in nonlinear crystals. The fifth harmonic output powers were 3.6 μW at 149.8 nm and 110 μW at 154.0 nm, respectively. The phase matching angles measured from 149.8 nm to 158.1 nm are larger by 3-4 degrees than those expected from the existing Sellmeier equation. The optical transmission spectra of some KBBF crystals were measured by the spectrophotometer. The transmittance near the absorption edge supports the generation of coherent radiation below 150 nm. The improvement of a prism-coupled device contributed to the generation of coherent radiation below 150 nm. Another reason for the present break through to the shorter wavelength is the use of the short pulse driving source compared with our previous research.

Paper Details

Date Published: 20 February 2017
PDF: 10 pages
Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008804 (20 February 2017); doi: 10.1117/12.2249976
Show Author Affiliations
Tomoharu Nakazato, Tokyo Univ. of Science (Japan)
Isao Ito, The Univ. of Tokyo (Japan)
Yohei Kobayashi, The Univ. of Tokyo (Japan)
Xiaoyang Wang, Technical Institute of Physics and Chemistry (China)
Chuangtian Chen, Technical Institute of Physics and Chemistry (China)
Shuntaro Watanabe, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 10088:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVI
Konstantin L. Vodopyanov; Kenneth L. Schepler, Editor(s)

© SPIE. Terms of Use
Back to Top