Enhanced stimulated Raman scattering in optical parametric oscillators from periodically poled KTiOPO4

Pasiskevicius, Valdas; Fragemann, Anna; Laurell, Fredrik; Butkus, R.; Smilgevičius, V.; Piskarskas, A.

doi:10.1063/1.1539923

Cited by 38 publications

(17 citation statements)

References 10 publications

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“…We therefore employed a PPLN crystal cut in the X(YY)Z plane as a basis for our observations and study of simultaneous SRS and SHG in PPLN. The SRS process is acknowledged to be extremely sensitive to the wavelength of the pump source [8]. We therefore exploit the SSFS effect in photonic crystal fibre (PCF) to create a suitable high peak power source for investigating the SRS process in PPLN.…”

Section: Introductionmentioning

confidence: 99%

“…Although there are many reports of SRS in bulk nonlinear materials, reports on SRS in periodically poled materials are currently limited. Pasiskevicius et al [8] described SRS in an optical parametric oscillator (OPO) based on periodically poled KTiOPO4 (PPKTP). PPLN has a substantially higher third-order nonlinear gain coefficient than PPKTP [5,9] and therefore potentially enables more efficient SRS.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous stimulated Raman scattering and second harmonic generation in periodically poled lithium niobate

McConnell

Ferguson

2005

Opt. Express

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous stimulated Raman scattering and second harmonic generation in periodically poled lithium niobate

McConnell

Ferguson

2005

Opt. Express

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“…The control and signal pulses propagate in the Xdirection, each with Z-polarization. In this configuration [X(ZZ)X], KTP exhibits multiple vibrational Raman peaks in the Stokes spectrum on the interval from ∼50 cm −1 to ∼850 cm −1 shift [35,36]. In Fig.…”

mentioning

confidence: 99%

Raman-induced slow-light delay of THz-bandwidth pulses

et al. 2016

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We propose and experimentally demonstrate a scheme to generate optically-controlled delays based on off-resonant Raman absorption. Dispersion in a transparency window between two neighboring, optically-activated Raman absorption lines is used to reduce the group velocity of broadband 765 nm pulses. We implement this approach in a potassium titanyl phosphate (KTP) waveguide at room temperature, and demonstrate Raman-induced delays of up to 140 fs for a 650-fs duration, 1.8-THz bandwidth, signal pulse; the available delay-bandwidth product is ≈ 1. Our approach is applicable to single photon signals, offers wavelength tunability, and is a step toward processing ultrafast photons.The effective operation of communication networks requires the ability to buffer and control the movement of information, whether in a postal service [1], or a quantum network [2]. All-optical controls are particularly desirable for classical and quantum photonic communication systems because manipulations can be effected rapidly, enabling high-bandwidth operations. The need for photonic propagation controls has motivated much research toward the development of slow light devices. These technologies modify the dispersion relationship between photon energy and momentum to reduce the group velocity of optical pulses; for example, using dispersion close to a reflection resonance in periodically-structured photonic media, or material dispersion associated with optical resonance features causing gain or loss [3]. Potential network applications of slow light include optical switching, signal synchronization, and buffering for all-optical routers [4]. In addition, slow light offers the prospect of improved optical sensing [5], and enhanced nonlinear interactions [6][7][8].Periodically-structured media slow light near reflection resonances, where energy is transferred between strongly-coupled forward-and backward-propagating waves, thereby reducing the group velocity [6]. Bragg gratings offer a simple implementation, however, more sophisticated coupled resonator structures are necessary to reduce the group velocity while minimizing higher-order dispersion which distorts the shape of pulses. For example, cascaded Bragg gratings [9], Moiré gratings [10,11], ring resonators [12], and photonic crystal structures [13][14][15][16][17] have all been used to demonstrate slow light. However, such structures offer limited tunability and lack continuous optical control when compared with optical absorption and gain resonance techniques.Slow light has been achieved for pulses tuned between absorbing resonances in an atomic vapour [18][19][20][21][22]. In one demonstration, pulses as short as 275 ps were delayed by up to 6.8 ps [19]. Motivated by the desire for optical control of slow light, a variety of nonlinear phenomena have been exploited, including, stimulated Brillouin scattering (SBS) [23,24], stimulated Raman scattering (SRS) [25], and electromagnetically-induced transparency (EIT) [26,27]. In EIT, a control field opens a narrow transparency window wit...

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“…Its large electro-optic coefficient, low dielectric constant and ion exchange properties also make it suitable for electro-optic 1 and waveguided laser devices. 2 The crystal was previously shown to be an efficient source for multi-wavelength pulse generation via stimulated Raman scattering (SRS) 3,4 or as a combination of SRS and efficient second order frequency conversion. 5 Renewed interest came with recent SRS experiments on high-frequency crystal vibrations that promised a pathway towards a solid-state sub-optical-cycle waveform source.…”

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confidence: 99%

“…27, yields in somewhat distorted spectral data. Thus, equations above need to be solved in order to retrieve Raman spectra along with the dispersion of the real part of the associated resonant third order nonlinearity ( χ (3) (ω)). The Fourier transform (S as (ω)) of the measured time-dependent CARS signal is a first step in solving the equations.…”

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confidence: 99%

Resolving fine spectral features in lattice vibrational modes using femtosecond coherent spectroscopy

2016

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We show resolution of fine spectral features within several Raman active vibrational modes in potassium titanyl phosphate (KTP) crystal. Measurements are performed using a femtosecond time-domain coherent anti-Stokes Raman scattering spectroscopy technique that is capable of delivering equivalent spectral resolution of 0.1 cm−1. The Raman spectra retrieved from our measurements show several spectral components corresponding to vibrations of different symmetry with distinctly different damping rates. In particular, linewidths for unassigned optical phonon mode triplet centered at around 820 cm−1 are found to be 7.5 ± 0.2 cm−1, 9.1 ± 0.3 cm−1, and 11.2 ± 0.3 cm−1. Results of our experiments will ultimately help to design an all-solid-state source for sub-optical-wavelength waveform generation that is based on stimulated Raman scattering.

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Enhanced stimulated Raman scattering in optical parametric oscillators from periodically poled KTiOPO4

Abstract: Periodically poled Li Nb O 3 : Optical parametric oscillation at wavelengths larger than 4.0 μ m with strong idler absorption by focused Gaussian beam High-repetition-rate femtosecond optical parametric oscillator based on periodically poled lithium niobate

Cited by 38 publications

References 10 publications

Simultaneous stimulated Raman scattering and second harmonic generation in periodically poled lithium niobate

Simultaneous stimulated Raman scattering and second harmonic generation in periodically poled lithium niobate

Raman-induced slow-light delay of THz-bandwidth pulses

Resolving fine spectral features in lattice vibrational modes using femtosecond coherent spectroscopy

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