Measurement of Pump-Induced Absorption and Refractive Index Changes in GaInAsP/InP Waveguides Using an Optical Loop Mirror Interferometer

Seo, J.-K.; Mizumoto, Tetsuya

doi:10.1143/jjap.43.5800

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2006

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“…The measurement setup is simple and has the advantage of robustness against environmental fluctuations, since split probe signals traverse the same path. 13) Active stabilizers were not employed in configuring the interferometer.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Properties in GaInAsP/InP Waveguides below the Band-gap Wavelength

Seo

Mizumoto

2006

jjap

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From picosecond pump-probe and interferometric experiments, we measured the intensity-dependent absorption and refractive index changes of GaInAsP/InP waveguides whose band-gap wavelengths ranged from 1.2 to 1.41 µm. An optical loop mirror interferometer was employed to measure the refractive index change in a time domain. The temporal response of the probe in GaInAsP waveguides was shown to be instantaneous following 4 ps pump pulses. The intensity-dependent refractive index coefficient was measured to be from -0.55 ×10-12 to -3.37 ×10-12 cm2/W. Also, intensity-dependent absorption changes were compared for three types of waveguide.

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Section: Introductionmentioning

confidence: 99%