Overlap integral analysis for second-harmonic generation within inverted waveguide using mode dispersion phase match

Flueraru, Costel; Grover, C. P.

doi:10.1109/lpt.2003.809927

Cited by 16 publications

(8 citation statements)

References 8 publications

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“…Due to the different mode numbers, the spatial overlap between the fundamental and second harmonic modes is calculated to be ~4.5% using an equation in Ref. [26]. Although the spatial overlap appears not very high, the reduction in the conversion efficiency caused by the insufficient overlap can be compensated by the high-Q factor of the microresonator that leads to extension of the interaction length.…”

Section: Discussionmentioning

confidence: 99%

Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining

Lin

Fang

et al. 2015

Sci. China Phys. Mech. Astron.

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Nonlinear optical processes in whispering gallery mode (WGM) microresonators have attracted much attention. Owing to the strong confinement of light in a small volume, a WGM microresonator can dramatically boost the strength of light field, thereby promoting the nonlinear interaction between the light and the resonator material. However, realization of efficient nonlinear parametric process in microresonators is a challenging issue. The major difficulty is to simultaneously ensure the phase matching condition and a coherent multiple resonance condition for all the waves participating in the nonlinear conversion process. Here, we demonstrate highly efficient second harmonic generation (SHG) in an on-chip lithium niobate microresonator fabricated by femtosecond laser direct writing. We overcome the difficulty of double resonance for the phase matched pump and second harmonic waves by selectively exciting high order modes in the fabricated thin-disk microresonator. Our technique opens opportunities for integrated classical and quantum photonic applications.

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Section: Discussionmentioning

confidence: 99%

Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining

Lin

Fang

et al. 2015

Sci. China Phys. Mech. Astron.

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“…One of the early demonstrations of MPM in GaAs optical waveguides was by Anderson et al [47] near 10 µm and van der Ziel et al [48] at 2 µm. There have been several other theoretical and experimental realizations of MPM in a variety of polymer and ZnTe waveguides [95][96][97][98][99][100]. The expected normalized conversion efficiency, P SH /(P 2 FF L 2 ), in optimized structures is a factor of 20 lower than in birefringent semiconductor waveguides and it is comparable with PPLN.…”

Section: Modal Phase Matchingmentioning

confidence: 99%

Nonlinear frequency conversion in semiconductor optical waveguides using birefringent, modal and quasi-phase-matching techniques

Rao¹,

Moutzouris²,

Ebrahim-Zadeh³

2004

J. Opt. A: Pure Appl. Opt.

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We describe the use of GaAs-based semiconductor optical waveguides for nonlinear frequency conversion of femtosecond pulses in the infrared. Different techniques for the realization of phase matching, including artificial birefringence, quasi-phase-matching and modal dispersion, are reported and analysed and key issues relating to efficiency, practicality and applicability are discussed. Using the data obtained from these experiments, an overall comparison is made with other prominent techniques in order to identify the most promising and viable route to the development of efficient semiconductor waveguide frequency conversion devices for incorporation in the future generation of integrated photonic networks. Millenia Ti:Sapphire PPLN OPO Signal / Idler RG 850 P M T Lock-In Amp. Chopper Drive Voltage Control Beam Diagnostics λ /2 @ 1.55 µ m Chopper Monochromator Flipper Mirrors Polarizing Beam splitter IR Camera Sample X 40 X 20 X 40 X 20 Beam Diagnostics λ /2 @ 1.55/2.0 µ m Flipper Mirrors Polarizing Beam splitter IR Camera

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“…The cascade structure, which is a concatenated form of SNW and ChGW, has been optimized through finite-element based COM-SOL Multiphysics. COMSOL provides the effective refractive index (n eff ) and mode effective area (A eff ) of the fundamental quasi-transverse electric (FQTE, H 11 y ) mode for the proposed structure up to the interested wavelength region, which is later used to compute the most significant parameters: group-velocity dispersion (GVD, D) and nonlinear co-efficient (γ) [46] [47].…”

Section: Theoretical Modelmentioning

confidence: 99%

“…The mode field mismatch at the junction point between the two segments of the cascade waveguide structure can be calculated using the overlap integral (OI) [47]…”

Section: Theoretical Modelmentioning

confidence: 99%

Analysis and design of dispersion-engineered cascaded channel waveguide for mid-infrared supercontinuum generation employing pump source at telecommunication wavelength

Karim

Kayed

Rahman

2021

Optics Communications

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Overlap integral analysis for second-harmonic generation within inverted waveguide using mode dispersion phase match

Cited by 16 publications

References 8 publications

Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining

Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining

Nonlinear frequency conversion in semiconductor optical waveguides using birefringent, modal and quasi-phase-matching techniques

Analysis and design of dispersion-engineered cascaded channel waveguide for mid-infrared supercontinuum generation employing pump source at telecommunication wavelength

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