Continuous-wave second-harmonic generation in modal phase matched semiconductor waveguides

Ducci, S.; Lanco, L.; Berger, V.; Rossi, Alfredo De; Ortiz, V.; Calligaro, M.

doi:10.1063/1.1703847

Cited by 64 publications

(51 citation statements)

References 12 publications

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“…As such, several waveguide structures have been developed so far by many groups in order to achieve it in AlGaAs waveguides. These include multilayer AlGaAs/Al 2 O 3 waveguides for artificial form birefringence phase matching (FBPM) [69,70], engineered-waveguides for modal phase matching (MPM) [71,72], Bragg reflection waveguides (BRW) for MPM [73], orientation patterned GaAs (OP-GaAs) for quasi-phase matching (QPM) via domain reversal [74], and periodically switching nonlinearity (PSN) via etch-and-regrowth for QPM [75]. A comprehensive discussion of these techniques may be found in Ref.…”

Section: Periodically Intermixed Waveguidesmentioning

confidence: 99%

Optical frequency conversion in integrated devices [Invited]

et al. 2011

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We review our recent progresses on frequency conversion in integrated devices, focusing primarily on experiments based on strip-loaded and quantum-well intermixed AlGaAs waveguides, and on CMOS-compatible high-index doped silica glass waveguides. The former includes both second-and third-order interactions, demonstrating wavelength 2 conversion by tunable difference-frequency generation over a bandwidth of more than 100 nm, as well as broadband self-phase modulation and tunable four-wave mixing. The latter includes four-wave mixing using low-power continuous-wave light in microring resonators as well as hyper-parametric oscillation in a high quality factor resonator, towards the realization of an integrated multiple wavelength source with important applications for telecommunications, spectroscopy, and metrology.

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Section: Periodically Intermixed Waveguidesmentioning

confidence: 99%

Optical frequency conversion in integrated devices [Invited]

et al. 2011

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“…Of particular importance for this paper, SHG has been previously realized in isotropic AlGaAs by way of modal phase-matching (MPM) [7,8], quasi-phase-matching (QPM) [8][9][10], or artificial birefringence [8,11]. Unfortunately, most of the proposed solutions require costly and complex fabrication procedures.…”

Section: Introductionmentioning

confidence: 99%

“…However, this cannot be easily achieved in an arbitrary geometry due to the inherent material dispersion. For momentum conservation to be satisfied, bulk birefringent crystals (such as BBO and KTP) [2,3] as well as waveguide geometries (in polymers [4], LiNbO 3 [5,6], and semiconductors [7][8][9][10][11]) have been successfully used. The latter solution has recently gained a significant amount of scientific attention, resulting in the development and improvement of several phase-matching techniques in waveguiding structures.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, most of the proposed solutions require costly and complex fabrication procedures. In particular, they include (i) the introduction of additional thin oxidized layers of Al (in the core region of the waveguides) in order to break the isotropy of GaAs and induce artificial birefringence [11]; (ii) periodic domain orientations or quantum well intermixing [8][9][10] for QPM; or (iii) multi--step etching of "M-shaped" waveguides for MPM [7,8]. In addition, even more advanced photonic structures in the form of the Bragg reflector waveguides [16], ring resonators [17], and waveguide couplers [18] suitable for SHG have also been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Second Harmonic Generation in AlGaAs Nanowaveguides

et al. 2011

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In this paper, we investigate semiconductor nanowaveguides (i.e. ridge waveguides with core-widths narrower than 1 µm) intended to act as novel optical light sources through nonlinear wavelength/frequency conversion. In particular, numerical calculations have been performed in order to design suitable photonic devices (fabricated in the AlGaAs/GaAs platform) capable of high efficiency second harmonic generation. Particular interest has been dedicated to the effective conversion of optical signals from 1520-1600 nm (the third telecom window) down to 760-800 nm. We demonstrate that the output wavelength (resulting from modal phase-matching) can be dynamically tuned by proper adjustment of the temperature and/or geometrical parameters of the waveguides. In addition, by changing the waveguide width it is also possible to modify the device dispersion characteristics, giving the possibility to work in the region of anomalous dispersion and thus allowing for the generation of temporal solitons.

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“…This efficiency is comparable to the one achievable in artificially birefringent AlGaAs waveguides, 19 and almost two orders of magnitude higher than what is available with GaAs/AlGaAs waveguides operated with modal phase-matching. 20 …”

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confidence: 99%

Directional quasi-phase matching AlGaAs waveguide microresonators for efficient generation of quadratic frequency combs

et al. 2017

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Optical frequency combs currently represent enabling components in a wide number of fast-growing research fields, from frequency metrology to precision spectroscopy, from synchronization of telecommunication systems to environmental and biomedical spectrometry. As recently demonstrated, quadratic nonlinear media are a promising platform for optical frequency combs generation, through the onset of an internally pumped optical parametric oscillator in cavity enhanced second-harmonic generation systems. We present here a proposal for quadratic frequency comb generation in AlGaAs waveguide resonators. Based on the crystal symmetry properties of the AlGaAs material, quasi-phase matching can be realized in curved geometries (directional quasi-phase matching), thus ensuring efficient optical frequency conversion. We propose a novel design of AlGaAs waveguide resonators with strongly reduced total losses, compatible with long-path, high-quality resonators. By means of a numerical study, we predict efficient frequency comb generation with threshold powers in the microwatt range, paving the way for the full integration of frequency comb synthesizers in photonic circuits.

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Continuous-wave second-harmonic generation in modal phase matched semiconductor waveguides

Cited by 64 publications

References 12 publications

Optical frequency conversion in integrated devices [Invited]

Optical frequency conversion in integrated devices [Invited]

Second Harmonic Generation in AlGaAs Nanowaveguides

Directional quasi-phase matching AlGaAs waveguide microresonators for efficient generation of quadratic frequency combs

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