Effective non-linear coefficients of optical waveguides

Grant, R. S.

doi:10.1007/bf00347646

Cited by 13 publications

(12 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To isolate the nonlinear behavior of the superlattice itself, it was necessary to account for the contributions from the bulk AlGaAs layers in the measured data. Using the formalism of Grant [12], the total effective change in the index of refraction due to third-order nonlinear refraction is…”

Section: Nonlinear Optical Measurementsmentioning

confidence: 99%

Polarization-dependent nonlinear refraction and two-photon absorption in GaAs/AlAs superlattice waveguides below the half-bandgap

et al. 2007

View full text Add to dashboard Cite

Values for the two-photon absorption coefficient, ␣ 2 , and nonlinear refractive index coefficients, n 2 , are measured for a waveguide core made of 14:14 monolayer GaAs/ AlAs superlattice at photon energies below the half-bandgap. Two-photon absorption coefficients show significant anisotropy with the TE mode having ␣ 2 values up to four times greater than the TM mode. For nonlinear refraction, we determined values of the nonlinear index for the TE mode that are as much as two times larger than the TM mode. Measurements of crossphase modulation between the TE and TM modes gave ratios of cross-phase modulation to self-phase modulation that were highly anisotropic.

show abstract

Section: Nonlinear Optical Measurementsmentioning

confidence: 99%

Polarization-dependent nonlinear refraction and two-photon absorption in GaAs/AlAs superlattice waveguides below the half-bandgap

et al. 2007

View full text Add to dashboard Cite

show abstract

“…However, if the optical mode is distributed in the core and cladding region, an effective n 2 is used to consider the nonlinearity from both cladding and core. Ref [4]. has derived the formula of effective n 2 for low-index contrast waveguide (n core n clad n eff ), such as optical fibers.…”

Section: Introductionmentioning

confidence: 99%

Ultra-low loss Si_3N_4 waveguides with low nonlinearity and high power handling capability

Tien¹,

Bauters²,

Heck³

et al. 2010

Opt. Express

View full text Add to dashboard Cite

We investigate the nonlinearity of ultra-low loss Si3N4-core and SiO2-cladding rectangular waveguides. The nonlinearity is modeled using Maxwell's wave equation with a small amount of refractive index perturbation. Effective n2 is used to describe the third-order nonlinearity, which is linearly proportional to the optical intensity. The effective n2 measured using continuous-wave self-phase modulation shows agreement with the theoretical calculation. The waveguide with 2.8-μm wide and 80-nm thick Si3N4 core has low loss and high power handling capability, with an effective n2 of about 9×10(-16) cm2/W.

show abstract

“…For a waveguide structure, Eq. (11) can also be used provided that ␣ 2,j is replaced with the effective TPA coefficient and I j is replaced with the third-order nonlinear effective intensity [20]. An intensity dependence of the refractive index in nonlinear optical media occurs through the SPM, which leads to nonlinear phase shifting and spectral broadening of optical pulses.…”

Section: Theoretical Frameworkmentioning

confidence: 99%

“…where, in a guided-wave structure, n 2,j is the effective nonlinear refraction for the harmonic j [20].…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Femtosecond second-harmonic generation in AlGaAs Bragg reflection waveguides: theory and experiment

et al. 2010

View full text Add to dashboard Cite

The impact of third-order nonlinearities including self-phase modulation and two-photon absorption on the efficiency of the second-harmonic generation is numerically investigated using the split-step Fourier method in phase-matched Bragg reflection waveguides. Also using the same technique, the adverse effects of group velocity mismatch and group velocity dispersion of the interacting frequencies on the efficiency of the nonlinear process are examined and contrasted for optimal sample design. Using an optimized structure, we report efficient femtosecond second-harmonic generation in monolithic AlGaAs Bragg reflection waveguides for a type II nonlinear interaction. For a 190 fs pulsed pump around 1555 nm with an average power of 3.3 mW, a peak second-harmonic power of 25.5 W is measured in a sample with a length of 1.1 mm. The normalized conversion efficiency of the process is estimated to be 2.0ϫ 10 4 % W −1 cm −2. Pump depletion is clearly observed when operating at the phase-matching wavelength.

show abstract

Effective non-linear coefficients of optical waveguides

Cited by 13 publications

References 29 publications

Polarization-dependent nonlinear refraction and two-photon absorption in GaAs/AlAs superlattice waveguides below the half-bandgap

Polarization-dependent nonlinear refraction and two-photon absorption in GaAs/AlAs superlattice waveguides below the half-bandgap

Ultra-low loss Si_3N_4 waveguides with low nonlinearity and high power handling capability

Femtosecond second-harmonic generation in AlGaAs Bragg reflection waveguides: theory and experiment

Contact Info

Product

Resources

About