Nonlinear amplification of side-modes in frequency combs.
Opt Express
; 21(10): 11670-87, 2013 May 20.
Article
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| MEDLINE
| ID: mdl-23736390
ABSTRACT
We investigate how suppressed modes in frequency combs are modified upon frequency doubling and self-phase modulation. We find, both experimentally and by using a simplified model, that these side-modes are amplified relative to the principal comb modes. Whereas frequency doubling increases their relative strength by 6 dB, the growth due to self-phase modulation can be much stronger and generally increases with nonlinear propagation length. Upper limits for this effect are derived in this work. This behavior has implications for high-precision calibration of spectrographs with frequency combs used for example in astronomy. For this application, Fabry-Pérot filter cavities are used to increase the mode spacing to exceed the resolution of the spectrograph. Frequency conversion and/or spectral broadening after non-perfect filtering reamplify the suppressed modes, which can lead to calibration errors.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Refractometría
/
Análisis Espectral
/
Amplificadores Electrónicos
/
Interferometría
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Alemania