Generation of spectral clusters in a mixture of noble and Raman-active gases
Abstract
We report a novel scheme for the generation of dense clusters of Raman sidebands. The scheme uses a broadband-guiding hollow-core photonic crystal fiber (HC-PCF) filled with a mixture of H2, D2, and Xe for efficient interaction between the gas mixture and a green laser pump pulse (532 nm, 1 ns) of only 5 uJ energy. This results in the generation from noise of more than 135 ro-vibrational Raman sidebands covering the visible spectral region with an average spacing of only 2 THz. Such a spectrally dense and compact fiber-based source is ideal for applications where closely spaced narrow-band laser lines with high spectral power density are required, such as in spectroscopy and sensing. When the HC-PCF is filled with a H2-D2 mixture the Raman comb spans the spectral region from the deep UV (280 nm) to the near infrared (1000 nm).
- Publication:
-
Optics Letters
- Pub Date:
- December 2016
- DOI:
- 10.1364/OL.41.005543
- arXiv:
- arXiv:1609.05019
- Bibcode:
- 2016OptL...41.5543H
- Keywords:
-
- Physics - Optics
- E-Print:
- 6 pages, 4 figures, 1 table