Measurement of group refractive indices of glass using a color-selective multi-pulse generated with a spatial light modulator

• DOI: 10.1364/ol.421021
• Publication Date: 2021-02-26T21:00:29Z
• Authors: Hisanari Takahashi; Koyo Watanabe; Kyohhei Shigematsu; Takashi Inoue; Hiroshi Satozono
• Keywords: Spatial light modulator; Self-phase modulation

We demonstrate a method of measuring group refractive indices ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msub> <mml:mi>n</mml:mi> <mml:mi mathvariant="normal">g</mml:mi> </mml:mrow> </mml:msub> </mml:math> ) by using only temporal waveform color-selective multi-pulse (CSMP) generated with spatial-light-modulator-based optical pulse shaper. Each the CSMP is characterized different spectral components. Thus, sample can be estimated calculating delay spectrally pulses in after passing through sample. As proof-of-concept, we measured glass plate CSMP. confirmed that values were agreement those derived from Sellmeier’s formula an accuracy on order <mml:mn>1</mml:mn> <mml:msup> <mml:mn>0</mml:mn> <mml:mo>−</mml:mo> <mml:mn>4</mml:mn> </mml:msup> .