Efficient generation of green and UV light in a single PP-KTP waveguide pumped by a compact all-fiber system

Rusu, M.; Rafailov, Edik U.; Herda, Robert; Okhotnikov, Oleg G.; Saltiel, S. M.; Battle, Philip; McNeil, Shirley; Grudinin, A.B.; Sibbett, W.

doi:10.1063/1.2187396

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…Our experiments were performed with ~10W peak pump powers, corresponding to a reduction of 5 to 6 orders of magnitude compared to previous reports 13,14,15,16 of THG in silicon. Even more significantly, this work represents a nearly 100-fold reduction in pump power relative to fully phase-matched THG in PPLN/KTP waveguides 29 . Although a comparable power density (~GW/cm 2 ) has been achieved in ultra-high Q (>10 7 ) cavities 18 , the advantage of the PhC waveguide approach is that the full bandwidth of short optical pulses can be accommodated.…”

Section: D Phcs Have Recently Attracted Considerable Attention By Comentioning

confidence: 95%

Green light emission in silicon through slow-light enhanced third-harmonic generation in photonic-crystal waveguides

et al. 2009

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Slow light has attracted significant interest recently as a potential solution for optical delay lines and time-domain optical signal processing 1,2. Perhaps even more significant is the possibility of dramatically enhancing nonlinear optical effects 3,4 due to the spatial compression of optical energy 5,6,7. Two-dimensional (2D) silicon photonic crystal (PhC) waveguides have proven to be a powerful platform for realizing slow light, being compatible with on-chip integration and offering wide-bandwidth and dispersion-free propagation 2. Here, we report the slow light enhancement of a nonlinear optical process in a 2D silicon PhC waveguide. We observe visible third-harmonic generation (THG) at a wavelength of 520nm with only a few watts of peak power, and demonstrate strong THG enhancement due to the reduced group velocity of the near-infrared pump signal. This demonstrates yet another unexpected nonlinear function realized in a CMOS-compatible silicon waveguide. Main text Although silicon has been the material of choice for the CMOS industry and more recently for integrated photonics, its optical properties-e.g light emission-still provide major challenges. In addition to an indirect band-gap and inversion symmetry,

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Section: D Phcs Have Recently Attracted Considerable Attention By Comentioning

confidence: 95%

Green light emission in silicon through slow-light enhanced third-harmonic generation in photonic-crystal waveguides

et al. 2009

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“…Recently, second-and third-harmonic generation in a periodically poled potassium titanyl phosphate (PPKTP) waveguide using a compact femtosecond Yb-based laser with conversion efficiencies of up to 33% (532 nm) and 2% (355 nm), respectively, were demonstrated [13]. Green (532 nm) and yellow (560 nm) picosecond pulse sources that utilize SHG of Yb-doped fiber-based pump sources in PPKTP waveguides with maximum average powers of 41.7 μW and 2.3 mW, respectively, were also presented [14].…”

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confidence: 99%

Orange-to-red tunable picosecond pulses by frequency doubling in a diode-pumped PPKTP waveguide

et al. 2013

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A compact picosecond all-room-temperature orange-to-red tunable laser source in the spectral region between 600 and 627 nm is demonstrated. The tunable radiation is obtained by second-harmonic generation in a periodically poled potassium titanyl phosphate (PPKTP) multimode waveguide using a tunable quantum-dot external-cavity mode-locked laser. The maximum second-harmonic output peak power of 3.91 mW at 613 nm is achieved for 85.94 mW of launched pump peak power at 1226 nm, resulting in conversion efficiency of 4.55%.

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“…Ultraviolet (UV) generation has traditionally relied on crystals and gases to allow frequency conversion from longer wavelengths [1][2][3][4][5][6][7][8][9][10]. These methods involve the use of nonlinear crystals such as KTP, KDP, sapphire, K2Al2B2O7, potassium pentaborate (KB5), the exploitation of nonlinear processes in waveguides such as photonic crystal fibers or the use of hybrid schemes employing both waveguides and nonlinear crystals [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…These methods involve the use of nonlinear crystals such as KTP, KDP, sapphire, K2Al2B2O7, potassium pentaborate (KB5), the exploitation of nonlinear processes in waveguides such as photonic crystal fibers or the use of hybrid schemes employing both waveguides and nonlinear crystals [1][2][3][4][5][6][7]. Fiberized UV generation in optical fibers typically involve the use of gas-filled hollow core microstructured fibers, or otherwise exploit nonlinear processes such as supercontinuum generation to generate a broad spectrum which extends down to the UV wavelength region [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Four-wave mixing UV generation in optical microfibers

et al. 2016

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UV generation via four-wave-mixing (FWM) in optical microfibres (OMFs) was demonstrated. This was achieved by exploiting the tailorable dispersion of the OMF in order to phase match the propagation constant of the four frequencies involved in the FWM process. In order to satisfy the frequency requirement for FWM, a Master Oscillator Power Amplifier (MOPA) working at the telecom C-band was connected to a periodically poled silica fibre (PPSF), producing a fundamental frequency (FF) at 1550.3 nm and a second harmonic (SH) frequency at 775.2 nm. A by-product of this second harmonic generation is the generation of a signal at the third harmonic (TH) frequency of 516.7 nm via degenerate FWM. This then allows the generation of the fourth harmonic (FH) at 387.6 nm and the fifth harmonic (5H) at 310nm via degenerate and nondegenerate FWM in the OMF.The output of the PPSF was connected to a pure silica core fibre which was being tapered using the modified flame brushing technique from an initial diameter of 125 μm to 0.5 μm. While no signal at any UV wavelength was initially observed, as the OMF diameter reached the correct phase matching diameters, signals at 387.6 nm appeared. Signals at 310 nm also appeared although it is not phase matched, as the small difference in the propagation constant is bridged by other nonlinear processes such as self-phase and cross phase modulation.

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Efficient generation of green and UV light in a single PP-KTP waveguide pumped by a compact all-fiber system

Cited by 20 publications

References 19 publications

Green light emission in silicon through slow-light enhanced third-harmonic generation in photonic-crystal waveguides

Green light emission in silicon through slow-light enhanced third-harmonic generation in photonic-crystal waveguides

Orange-to-red tunable picosecond pulses by frequency doubling in a diode-pumped PPKTP waveguide

Four-wave mixing UV generation in optical microfibers

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