Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Indirectly seeded optical parametric generation in PPLN

M. J. Orozco-Arellanes, F. Alonso, L. A. Ríos, Roger Sean Cudney

Published Nov 18, 2003• 0 citations
Publisher

Abstract

We show that pulsed quasi-phase matched optical parametric generation can be indirectly seeded with a weak cw beam with a wavelength different from that of either the signal or the idler waves. This is accomplished by first mixing the cw seed beam with the pulsed pump beam in a periodically poled lithuim niobate (PPLN) crystal to produce a weak signal beam which is then further amplified in the same crystal. The crystal has two regions with different domain structure periodicities. In the first region the periodicity is chosen to create a beam at 1561.5 nm, resulting from mixing a 15 mW, 632.8 nm beam and an intense, 7 ns 1064 nm pulse. In the second region, the periodicity produces amplification of this signal beam at 1561.5 nm. The output beam inherits the spectral and mode characteristics of the weak seed beam.

DOI
10.1117/12.525198

Related papers

Broadband optical parametric amplification at the communication band with periodically poled lithium niobate

Oc‐Yeub Jeon, Min-Ji Jin, Hwan Hong Lim +2 more

We report broadband optical parametric generation (OPG) in a single periodically poled lithium niobate crystal with a picosecond pump pulse at a fixed wavelength. We also demonstrate efficient optical parametric amplification of a broadband seed pulse within the quasi-phase-matched OPG band. The broad parametric gain band is attributed to group-velocity matching and degeneracy between the signal and idler, and the broad spectral width of the pumping source.

Optics Express•Jan 1, 2006•16 citations

Characterization of type-II spontaneous parametric down-conversion in domain-engineered PPLN

Paulina S. Kuo, Thomas Gerrits, Varun Boehm Verma +4 more

We characterize spontaneous parametric downconversion in a domain-engineered, type-II periodically poled lithium niobate (PPLN) crystal using seeded emission and single-photon techniques. Using continuous-wave (CW) pumping at 775 nm wavelength, the signal and idler are at 1532.5 nm and 1567.5 nm, respectively. The domain-engineered crystal simultaneously phasematches signal and idler pairs: [H(1532.5 nm), V(1567.5 nm)] and [V(1532.5 nm), H(1567.5 nm)]. We observe the tuning curves of these processes through difference-frequency generation and through CW fiber-assisted, single-photon spectroscopy. These measurements indicate good matching in amplitude and bandwidth of the two processes and that the crystal can in principle be used effectively to generate polarization-entangled photon pairs.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 16, 2016•10 citations

Generation and Detection of Coherent Pulse Trains in Periodically Poled Lithium Niobate Through Optical Parametric Amplification

Dayen Chad Voratovic

This work reports on the generation, modulation, and detection of temporally coherent pulses in periodically-poled lithium niobate (PPLN) configured as an optical parametric amplifier (OPA).The OPA was pumped at 1 µm, by a 10 kHz, 1 ns, Nd:YAG laser.The cw seeding sources for the OPA were two separate 1550 nm lasers.One source had a short coherence length of .3km, the other a long coherence length of 95 km.The generated pulse trains where phase modulated by using a set of mirrors on a single axis motorized stage.A 10 km fiber optic delay line was used to simulate free space propagation.A homodyne, coherent optical detection system, utilizing the in-phase and quadrature components of the circularly polarized local oscillator, was built to detect the amplitude and phase modulated pulse trains.We report the detection of the modulated signal for the long coherence length source and the loss of the modulated signal for the short coherence length source, demonstrating that the OPA process can transfer the temporal coherence (or coherence length) of the input signal to the pulse-amplified signal

•Jan 1, 2011•0 citations

Experimental Performance of a Two-Stage Periodically Poled Lithium Niobate Parametric Amplifier

Anup R. Pandey, Peter Powers, Joseph W. Haus

A two-stage periodically poled lithium niobate parametric amplifier is used to boost the idler wave energy by almost a factor of three near the degenerate wavelength of the second stage. For nondegenerate values, the idler wave energy is boosted by a factor of two. Our experimental results validate a numerical model that includes arbitrary beam profiles, beam walkoff, pump depletion, and optical elements between crystals. Experimental performance of the whole system was found to be much more stable over a wide range of temperatures due to noncollinear phase-matching conditions in the second stage.

IEEE Journal of Quantum Electronics•Jan 1, 2008•8 citations

Wavelength shifting and amplification of optical pulses through cascaded second order processes in periodically-poled lithium niobate

Gian Piero Banfi, P.K. Datta, Vittorio Degiorgio +1 more

We report on wavelength-shifting based on cascaded second-order nonlinearities1 in periodically-poled lithium niobate. Wavelength shifting from a signal s at λs=λp+Δ to a frequency-shifted signal f at λf=λp−Δ is obtained under the action of a pump p at λp: the effect is realized through the generation of the second harmonic (sh) of p and subsequent parametric amplification of s driven by sh. In the latter process f is also generated. Exploiting the advantages of quasi-phase-matching, efficient shifting is achieved at pump intensities about two orders of magnitude lower than in traditional second-order materials such as BBO.2

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jan 1, 1998•1 citation

Optical parametric amplification of arbitrarily polarized light in periodically poled LiNbO_3

Guang-hao Shao, Xiao-shi Song, Fei Xu +1 more

Optical parametric amplification (OPA) of arbitrarily polarized light is proposed in a multi-section periodically poled Lithium Niobate (PPLN). External electric field is applied on selected sections to induce the polarization rotation of involved lights, thus the quasi-phase matched optical parametric processes exhibit polarization insensitivity under suitable voltage. In addition to the amplified signal wave, an idler wave with the same polarization is generated simultaneously. As an example, a ~10 times OPA showing polarization independency is simulated. Applications of this technology are also discussed.

Optics Express•Aug 8, 2012•11 citations
We show that pulsed quasi-phase matched optical parametric generation can be indirectly seeded with a weak cw beam with a wavelength different from that of either the signal or the idler waves. This is accomplished by first mixing the cw seed beam with the pulsed pump beam in a periodically poled lithuim niobate (PPLN) crystal to produce a weak signal beam which is then further amplified in the same crystal. The crystal has two regions with different domain structure periodicities. In the first region the periodicity is chosen to create a beam at 1561.5 nm, resulting from mixing a 15 mW, 632.8 nm beam and an intense, 7 ns 1064 nm pulse. In the second region, the periodicity produces amplification of this signal beam at 1561.5 nm. The output beam inherits the spectral and mode characteristics of the weak seed beam.
We characterize spontaneous parametric downconversion in a domain-engineered, type-II periodically poled lithium niobate (PPLN) crystal using seeded emission and single-photon techniques. Using continuous-wave (CW) pumping at 775 nm wavelength, the signal and idler are at 1532.5 nm and 1567.5 nm, respectively. The domain-engineered crystal simultaneously phasematches signal and idler pairs: [H(1532.5 nm), V(1567.5 nm)] and [V(1532.5 nm), H(1567.5 nm)]. We observe the tuning curves of these processes through difference-frequency generation and through CW fiber-assisted, single-photon spectroscopy. These measurements indicate good matching in amplitude and bandwidth of the two processes and that the crystal can in principle be used effectively to generate polarization-entangled photon pairs.
This work reports on the generation, modulation, and detection of temporally coherent pulses in periodically-poled lithium niobate (PPLN) configured as an optical parametric amplifier (OPA).The OPA was pumped at 1 µm, by a 10 kHz, 1 ns, Nd:YAG laser.The cw seeding sources for the OPA were two separate 1550 nm lasers.One source had a short coherence length of .3km, the other a long coherence length of 95 km.The generated pulse trains where phase modulated by using a set of mirrors on a single axis motorized stage.A 10 km fiber optic delay line was used to simulate free space propagation.A homodyne, coherent optical detection system, utilizing the in-phase and quadrature components of the circularly polarized local oscillator, was built to detect the amplitude and phase modulated pulse trains.We report the detection of the modulated signal for the long coherence length source and the loss of the modulated signal for the short coherence length source, demonstrating that the OPA process can transfer the temporal coherence (or coherence length) of the input signal to the pulse-amplified signal
A two-stage periodically poled lithium niobate parametric amplifier is used to boost the idler wave energy by almost a factor of three near the degenerate wavelength of the second stage. For nondegenerate values, the idler wave energy is boosted by a factor of two. Our experimental results validate a numerical model that includes arbitrary beam profiles, beam walkoff, pump depletion, and optical elements between crystals. Experimental performance of the whole system was found to be much more stable over a wide range of temperatures due to noncollinear phase-matching conditions in the second stage.
We report on wavelength-shifting based on cascaded second-order nonlinearities1 in periodically-poled lithium niobate. Wavelength shifting from a signal s at λs=λp+Δ to a frequency-shifted signal f at λf=λp−Δ is obtained under the action of a pump p at λp: the effect is realized through the generation of the second harmonic (sh) of p and subsequent parametric amplification of s driven by sh. In the latter process f is also generated. Exploiting the advantages of quasi-phase-matching, efficient shifting is achieved at pump intensities about two orders of magnitude lower than in traditional second-order materials such as BBO.2
Optical parametric amplification (OPA) of arbitrarily polarized light is proposed in a multi-section periodically poled Lithium Niobate (PPLN). External electric field is applied on selected sections to induce the polarization rotation of involved lights, thus the quasi-phase matched optical parametric processes exhibit polarization insensitivity under suitable voltage. In addition to the amplified signal wave, an idler wave with the same polarization is generated simultaneously. As an example, a ~10 times OPA showing polarization independency is simulated. Applications of this technology are also discussed.