Ultra-violet generation by third-harmonic conversion in conventional solid-core fibers

Yuichi Takushima; Yosuke Orii; Asa Higashitani; Takeshi Manabe

doi:10.1117/12.2004203

12 March 2013 Ultra-violet generation by third-harmonic conversion in conventional solid-core fibers

Yuichi Takushima, Yosuke Orii, Asa Higashitani, Takeshi Manabe

Proceedings Volume 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII; 86040A (2013) https://doi.org/10.1117/12.2004203
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

We demonstrated ultra-violet (UV) generation by launching 1040-nm picosecond pulses into a step-index fused-silica fiber without tapering. Even in a conventional step-index fiber, the phase mismatching between LP01 mode of the fundamental wave and higher-order mode of the third-harmonic wave can be reduced by increasing the index contrast. In addition, in the cladding mode, Cherenkov-type phase matching is made possible. Thus, although the phase-matching is not achieved rigorously, THG can occur locally enough to observe the third-harmonic signal clearly at the output. In the experiment, we launched a picosecond pulse train from a 1040-nm fiber laser into a commercially available stepindex fiber with high index contrast. The UV light was observed in the wavelength range of 347-390 nm, and the output power of UV components was increased with the third- and fourth-order dependence. Also, we observed the bright bluelight emission along the fiber, which was originated from the fluorescence due to the defect of SiO₂/GeO₂ radiated by UV light (generated by THG).

Citation Download Citation

Yuichi Takushima, Yosuke Orii, Asa Higashitani, and Takeshi Manabe "Ultra-violet generation by third-harmonic conversion in conventional solid-core fibers", Proc. SPIE 8604, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII, 86040A (12 March 2013); https://doi.org/10.1117/12.2004203

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