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Methodology for materials analysis using swept-frequency feedback interferometry with terahertz frequency quantum cascade lasers.
Opt Express ; 22(15): 18633-47, 2014 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-25089482
ABSTRACT
Recently, we demonstrated an interferometric materials analysis scheme at terahertz frequencies based on the self-mixing effect in terahertz quantum cascade lasers. Here, we examine the impact of variations in laser operating parameters, target characteristics, laser-target system properties, and the quality calibration standards on our scheme. We show that our coherent scheme is intrinsically most sensitive to fluctuations in interferometric phase, arising primarily from variations in external cavity length. Moreover we demonstrate that the smallest experimental uncertainties in the determination of extinction coefficients are expected for lossy materials.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Opt Express Assunto da revista: Oftalmologia Ano de publicação: 2014 Tipo de documento: Artigo