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

Temperature-Independent Flexible Broadcasting based on Cascaded χ(2) Nonlinearities in a Broadband Type-0 Step-Chirped PPLN

Meenu Ahlawat, Ameneh Bostani, Amirhossein Tehranchi, Raman Kashyap

Published Jan 1, 2013• 0 citations
Publisher

Abstract

Tunable temperature-independent triple-idler broadcasting of a signal into selective WDM channels to cover whole C and L bands is demonstrated utilizing cascaded second-order interactions in a 20-mm-long step-chirped PPLN with an engineered ~28-nm-wide type-0 second-harmonic bandwidth.
DOI
10.1364/cleo_si.2013.ctu1g.5

Related papers

Tunable all-optical wavelength broadcasting in a PPLN with multiple QPM peaks

Meenu Ahlawat, Amirhossein Tehranchi, Krishnamoorthy Pandiyan +2 more

We experimentally demonstrate tunable multiple-idler wavelength broadcasting of a signal to selective channels for wavelength division multiplexing (WDM). This is based on cascaded χ(2) nonlinear mixing process in a novel multiple-QPM 10-mm-long periodically poled LiNbO3 having an aperiodic domain in the center. The idlers' spacing is varied utilizing detuning of the pump wavelength within the SHG bandwidth. The temperature-assisted tuning of QPM pump wavelengths allows shifting the idlers together to different set of WDM channels. Our experimental results indicate that an overall idler wavelength shift of less than 10 nm realized by selecting pump wavelengths via temperature tuning, is sufficient to cover up to 40 WDM channels for multiple idlers broadcasting.

Optics Express•Nov 19, 2012•34 citations

Agile multicasting based on cascaded χ^(2) nonlinearities in a step-chirped periodically poled lithium niobate

Meenu Ahlawat, Ameneh Bostani, Amirhossein Tehranchi +1 more

We experimentally demonstrate the possibility of agile multicasting for wavelength division multiplexing (WDM) networks, of a single-channel to two and seven channels over the C band, also extendable to S and L bands. This is based on cascaded χ(2) nonlinear mixing processes, namely, second-harmonic generation (SHG)-sum-frequency generation (SFG) and difference-frequency generation (DFG) in a 20-mm-long step-chirped periodically poled lithium niobate crystal, specially designed and fabricated for a 28-nm-wide SH-SF bandwidth centered at around 1.55 μm. The multiple idlers are simultaneously tuned by detuning the pump wavelengths within the broad SH-SF bandwidth. By selectively tuning the pump wavelengths over less than 10 and 6 nm, respectively, multicasting into two and seven idlers is successfully achieved across ~70 WDM channels within the 50 GHz International Telecommunication Union grid spacing.

Optics Letters•Jul 23, 2013•10 citations

Tunable Wavelength Broadcasting in a PPLN with Multiple QPM Peaks

Meenu Ahlawat, Amirhossein Tehranchi, Krishnamoorthy Pandiyan +2 more

Tunable multiple-idler broadcasting of a signal to selective WDM channels is demonstrated utilizing temperature-assisted tuning of QPM pump wavelengths based on cascaded nonlinear mixing in bulk PPLN with an aperiodic domain in the center.

OSA Advanced Photonics Congress•Jan 1, 2012•3 citations

Flexible wavelength conversion via cascaded second order nonlinearity using broadband SHG in MgO-doped PPLN

Junfeng Zhang, Yuping Chen, Feng Lu +1 more

In this paper, we experimentally demonstrate flexible wavelength conversion, in which the input signals can be freely converted to output wavelengths through widely and arbitrarily tuning the pump wavelength within a broad second harmonic (SH) bandwidth up to 25 nm. The scheme is based on the cascaded chi (2) process in a 20-mm periodically poled MgO-doped LiNbO(3) (PPMgLN). Also, wavelength broadcasting can be performed by simultaneous use of multiple pumps with wavelengths located in the broad SH bandwidth.

Optics Express•May 1, 2008•57 citations

All optical wavelength broadcast based on simultaneous Type I QPM broadband SFG and SHG in MgO:PPLN

Mingjun Gong, Yuping Chen, Feng Lu +1 more

We experimentally demonstrate wavelength broadcast based on simultaneous Type I quasi-phase-matched (QPM) broadband sum-frequency generation (SFG) and second-harmonic generation (SHG) in 5 mol.% MgO-doped periodically poled lithium niobate (MgO:PPLN). One signal has been synchronously converted into seven different wavelengths using two pumps at a 1.5 microm band via quadratic cascaded nonlinear wavelength conversion. By selecting different pump regions, i.e., selecting different cascaded chi((2)):chi((2)) interactions, the flexible wavelength conversions with shifting from one signal to single, double, and triple channels were also demonstrated.

Optics Letters•Aug 4, 2010•31 citations

Temperature-Tunable Telecom Photon-Pairs via Cascaded χ(2) Process in PPLN Waveguide

Ashish Samantaray, Vikash Kumar Yadav, Joyee Ghosh +1 more

We explore the cascaded χ(2) nonlinear process of second-harmonic generation (SHG) + spontaneous parametric down-conversion (SPDC) for telecom photon-pair generation. We experimentally verify our analytical prediction of discrete temperature-tunable signal/idler sidebands around a ~ 1550-nm pump.

Frontiers in Optics•Jan 1, 2023•0 citations
We experimentally demonstrate tunable multiple-idler wavelength broadcasting of a signal to selective channels for wavelength division multiplexing (WDM). This is based on cascaded χ(2) nonlinear mixing process in a novel multiple-QPM 10-mm-long periodically poled LiNbO3 having an aperiodic domain in the center. The idlers' spacing is varied utilizing detuning of the pump wavelength within the SHG bandwidth. The temperature-assisted tuning of QPM pump wavelengths allows shifting the idlers together to different set of WDM channels. Our experimental results indicate that an overall idler wavelength shift of less than 10 nm realized by selecting pump wavelengths via temperature tuning, is sufficient to cover up to 40 WDM channels for multiple idlers broadcasting.
We experimentally demonstrate the possibility of agile multicasting for wavelength division multiplexing (WDM) networks, of a single-channel to two and seven channels over the C band, also extendable to S and L bands. This is based on cascaded χ(2) nonlinear mixing processes, namely, second-harmonic generation (SHG)-sum-frequency generation (SFG) and difference-frequency generation (DFG) in a 20-mm-long step-chirped periodically poled lithium niobate crystal, specially designed and fabricated for a 28-nm-wide SH-SF bandwidth centered at around 1.55 μm. The multiple idlers are simultaneously tuned by detuning the pump wavelengths within the broad SH-SF bandwidth. By selectively tuning the pump wavelengths over less than 10 and 6 nm, respectively, multicasting into two and seven idlers is successfully achieved across ~70 WDM channels within the 50 GHz International Telecommunication Union grid spacing.
In this paper, we experimentally demonstrate flexible wavelength conversion, in which the input signals can be freely converted to output wavelengths through widely and arbitrarily tuning the pump wavelength within a broad second harmonic (SH) bandwidth up to 25 nm. The scheme is based on the cascaded chi (2) process in a 20-mm periodically poled MgO-doped LiNbO(3) (PPMgLN). Also, wavelength broadcasting can be performed by simultaneous use of multiple pumps with wavelengths located in the broad SH bandwidth.
We experimentally demonstrate wavelength broadcast based on simultaneous Type I quasi-phase-matched (QPM) broadband sum-frequency generation (SFG) and second-harmonic generation (SHG) in 5 mol.% MgO-doped periodically poled lithium niobate (MgO:PPLN). One signal has been synchronously converted into seven different wavelengths using two pumps at a 1.5 microm band via quadratic cascaded nonlinear wavelength conversion. By selecting different pump regions, i.e., selecting different cascaded chi((2)):chi((2)) interactions, the flexible wavelength conversions with shifting from one signal to single, double, and triple channels were also demonstrated.