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We report on the observation of collapse and revival of a spatial light grating stored into the Zeeman coherences of cold cesium atoms. Bragg diffraction is employed to probe the dynamic of the stored grating.
We have investigated the Bragg gratings for surface plasmonic polaritons modes in the metal-dielectric-air waveguide and proposed a bidirectional coupler which is capable to guide the incident light at different wavelengths along two predetermined directions.
We demonstrate 268 nm period planar Bragg gratings and Mach-Zehnder interferometers fabricated by direct UV-writing. Grating reflectivities of ~30 dB and FWHM of ~0.16 nm were measured at operational wavelengths around 800 nm.
Recently developed novel psilaflat fiberpsila substrate promises flexible, long-haul integrated optical devices. Here, we present the first demonstration of one such device; an evanescent field sensor, based upon direct UV written Bragg gratings.
We have proposed a new kind of ultra-narrow dual-bandpass fiber Bragg gratings. Based on the proposed grating, an ultra-narrow dual-channel filter is designed. Our filter has the same bandwidth and the even strength, as well as the ultra-narrow bandwidth as small as <1 pm.
Plasmon resonances in the transmission spectrum of a tilted Bragg grating in gold coated fibers are used to detect the binding of thiolated single stranded DNA and the further binding of the complementary target DNA.
We report an advance in the power scaling of fluoride fiber lasers using FBGs. Watt-level output power at 1480 nm is demonstrated, which is four-fold greater than the best result obtained with external bulk mirrors.
We report a PPLN crystal with a built-in electro-optic Bragg grating for both temperature-insensitive laser Q-switching and temperature-tuned wavelength conversion with 35% parametric efficiency from 1064 nm to mid-infrared wavelengths between 1440 and 2750 nm.
A spectrometer resolution limited 300 pm linewidth is achieved in a volume Bragg grating stabilized Thulium fiber laser. Slope efficiency and output power are comparable to a similar resonator formed by a broadband high reflectivity mirror.
The phase-shift technique for measuring group-delay has novel applications for aligning and commissioning grating compressors and balancing dispersion in large, high-energy petawatt and other complex, chirped-pulse amplifier systems.
We present a technique for improving the pulse-delay performance of stimulated Brillouin scattering (SBS) based slow-light system by combining it with a fiber Bragg grating (FBG) under distortion and system resource constraints.
We present a multiwavelength, time-division multiplexed laser that continuously cycles through 10 stable, tunable and spectrally narrow wavelengths at 30 kHz for absorption measurements in the R-branch of the v1+n3 band of H2O (1330-1380 nm).
We investigate polaritons resulting from excitons localized in arrays with energy and oscillator strength fluctuations embedded in microcavities. The polariton emission shape remains robust under oscillator strength fluctuations, but is more sensitive to energy fluctuations.
A fiber Bragg grating sensing system is demonstrated based on a continuous-wave Fourier domain mode locking fiber laser. Fiber Bragg grating interrogation is realized by mapping wavelength measurement to time measurement with an oscilloscope.
We report high-power operation of double-clad Yb-doped and Er,Yb-doped fiber lasers at 1066 nm and 1553 nm respectively using volume Bragg gratings for wavelength selection. Both lasers yielded output powers over 100 W limited by available pump power.
An optical-layer multicast was studied and implemented efficiently, safely, block-free, and with transparency to data rate and format in a wavelength-routing self-healing network employing chirped fiber gratings and optical circulators.
We demonstrate a compact millimeter wave signal generator based on a phase-modulated laser and a dual-band fiber Bragg grating (FBG). Two optical sidebands of a phase-modulated spectrum propagate through two transmission windows temporarily open in a chirped FBG (CFBG) by inducing localized temperature variations. The millimeter wave frequency is tuned by the separate adjustment of each temperature...
Integrated plasmonic devices may be isolated using plasmonic Bragg reflectors (PBRs). Systematic experimental characterization shows optimal reflection for three PBR layers, 45 nm deep. Isolation between series of nanohole array structures using PBRs is demonstrated.
We report experimental and numerical results on the pulse dynamic of passively modelocked Yb-doped fiber laser operating in the chirped-pulse regime. A newly design cavity with a CFBG provides positive dispersion with negligible nonlinearity.
A 1.2(height)times125(depth)times500(length) micro-slot was engraved along a fiber Bragg grating by chemically assisted femtosecond laser processing. By filling epoxy and UV-curing, waveguide with plastic-core and silica-cladding was created, presenting high thermal responding coefficient of 211pm/degC.
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