The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We design dispersion-compensated Raman/EDFA hybrid amplifiers recycling residual Raman pump for WDM systems. The first experimentally demonstration of broad band gain-clamped and gain flattened dispersion-compensated Raman/EDFA hybrid amplifiers by recycling residual Raman pump with a single FBG for WDM systems.
The amplification of light by a single excited molecule in free space is demonstrated in this paper. The extinction effect is the result of a destructive interference between the incident laser beam and the coherently scattered light from the molecule in the ground state. Thus, inversion of the population should lead to a phase shift of the scattered light and amplification of the laser light.
We report an experimental study of pulsed Raman gain in As2Se3 chalcogenide fiber, for pump pulses between 1470 nm and 1560 nm, achieving the highest Raman gain at the longest pump wavelength, where two-photon absorption is lowest.
We report GaAs-based transverse-junction-superluminescent-diodes, characterized as transverse-carrier-flow spread in quantum wells horizontally instead of vertical well-by-well injection. These devices overcome the problem of non-uniform-carrier-distribution and operate at a bio-optical window of 1.1-mum wavelength regime.
We present an imaging method that maps a 2D image into a serial time-domain waveform and simultaneously amplifies it optically. Continuous real-time images at a record frame rate of 6.1 MHz are captured using an oscilloscope.
By using two-section fiber where the first section has no spin and the second one is periodically spun, we demonstrate reduced polarization dependent gain and polarization mode dispersion in a distributed fiber Raman amplifier.
Using a two stage, white-light seeded, collinear, femtosecond optical parametric amplifier based on BIBO crystal, sub-30-fs signal pulses with energies exceeding 200-muJ, corresponding to 5-fold pulse shortening and ~30% internal conversion efficiency, are generated.
We apply pulse-front matching to a near-IR non-collinear optical parametric amplifier based on a bulk KTiOPO4 crystal. Pulses as broad as ~32 THz at ~1200 nm with almost no angular dispersion could be produced.
We demonstrate a novel idea of potentially-compact and cost-effective multiwavelength emitter using a single broadband semiconductor quantum-dash laser device coupled with an arrayed waveguide grating structure, that is suitable for wavelength-division-multiplexing transmission.
We present terahertz emission from nonpolar InN due to carrier transport in stacking fault-related internal in-plane electric fields. Evidence of in-plane transport is observed as a terahertz waveform polarity flip with reversal of the c-axis.
Si-nc light emission, overcoming limitations of c-Si, is described by a rate equation formalism within the ADE-FDTD scheme. Following this scheme, we design a series of resonant devices which tune and enhance the Si-nc luminescence.
This paper discusses the optical characteristics of a nonpolar a-plane InGaN/GaN quantum well (QW) with different indium compositions, QW well widths, and injection carrier densities. We find that the larger indium composition and smaller well width make the energy separation of |Yrang-like state to |Zrang-like state larger, and as a result enhance the polarization ratio of light. However, the polarization...
We report a pulsed, fully-fiberised, Yb-doped MOPA with a maximum average output power of 100 W. Adaptive pulse shaping was incorporated to reduce the impact of nonlinearities, delivering 2mJ flat-topped pulses with 20 kW peak power.
We experimentally observe light emission from a region that is far away from our on-chip device. We photograph up to 10-mum tunneling distance; this gap is greater than 20% of the device size.
We controlled the carrier-envelope phase (CEP) of a 5.5-fs, 2.7-mJ optical parametric chirped-pulse amplification system at a 1-kHz repetition rate, and observed clear CEP dependence of high harmonics.
We observe torsional phonons of quinquethiophene in the time-domain and exploit the coherence for controlling the photoluminescence yield. We use the pump-dump scheme with visible femtosecond pulses, detecting the time-integrated photoluminescence versus pump-dump delay.
For CO2 differential-absorption LIDAR, the single-mode output of a type-II PPLN entangled-cavity nanosecond doubly-resonant OPO emitting at 2.05 mum is amplified to 11 mJ, with 3 MHz rms frequency stability and a M2 < 1.9.
Over 108% single-pass net gains were achieved at wavelength of 1550 and 1500 nm both in highly transparent Er3+ doped and in Er3+ and Yb3+ codoped electro-optic lanthanum-modified lead zirconate titanate (PLZT) ceramics.
We report on the activation of the 1.1 Petawatt Laser (190 J, 170 fs) based on optical parametric chirped pulse amplification (OPCPA) and mixed Nd:glass amplification.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.