Spectral broadening of mid-infrared femtosecond pulses in GaAs

Autor:	Yusuke Kawahara, Satoshi Ashihara
Rok vydání:	2009
Předmět:	Physics business.industry Physics::Optics Nonlinear optics Infrared spectroscopy Atomic and Molecular Physics and Optics Gallium arsenide Wavelength chemistry.chemical_compound Optics chemistry Femtosecond Optoelectronics business Homogeneous broadening Self-phase modulation Doppler broadening
Zdroj:	Optics letters. 34(24)
ISSN:	1539-4794
Popis:	We achieved efficient spectral broadening for mid-IR pulses of few-microjoule energy. The spectral bandwidth of the femtosecond pulses at the center wavelength of 5000 nm increased from 540 nm to 2060 nm (from 220 to 910 cm(-1) in frequency) by nonlinear propagation in a gallium arsenide single crystal. The spectral broadening was accompanied by nonlinear absorption loss of 25%. The demonstrated scheme should be available at any operation wavelength within the material transparency range and provides a useful tool in nonlinear vibrational spectroscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34acc97b558cf9f748615534a038d2db https://pubmed.ncbi.nlm.nih.gov/20016631 Zobrazit plný text záznamu