We study the low-intensity light pulse propagation through an asymmetric double quantum well via Fanotype interference based on intersubband transitions. The propagation of the pulse across the quantum well is studied analytically and numerically with the coupled Maxwell-Schrödinger equations. We show the generation of ultraslow bright and dark optical solitons in this system. Whether the solit...

We report the compression of intense, carrier-envelope phase stable mid-IR pulses down to few-cycle duration using an optical filament. A filament in xenon gas is formed by using self-phase stabilized 330 microJ 55 fs pulses at 2 microm produced via difference-frequency generation in a Ti:sapphire-pumped optical parametric amplifier. The ultrabroadband 2 microm carrier-wavelength output is self...

We derive unidirectional pulse propagation equations to describe extreme high-intensity and ultra-broadband optical interactions in uniaxial crystals, showing both secondand third-order nonlinear optical susceptivities. Two nonlinearly coupled first order (in the propagation coordinate) equations describe the dynamics and interactions of the ordinary and extraordinary field polarizations, and a...

Picosecond optical pulse sources1 have been playing an increasingly impor tant role in the study of ultrafast processes and have potential application to highspeed electronics2 and optical communications. Interest in picosecond techniques has recently been stimulated by the generation of ultrashort pulses at high repetition rate, 3 but conventional sources have remained large and cumbersome lab...

Ultrashort optical pulses have a variety of applications, one of which is the development of optical time-devision multiplexing (OTDM) networks. Data is encoded in these short optical pulses (typically a few picoseconds in length) which are then interleaved in time to provide very high data rates on a single wavelength. Wavelengthdivision multiplexing (WDM) uses multiple channels by interleavin...

This paper attempts to clarify some fundamental concepts of femtosecond (fs) laser filamentation in an optical (transparent) medium since there are currently many new applications which are being explored. These range from remote sensing in the atmosphere to few cycle pulse generation, micro-material processing, writing wave guides, fiber Bragg gratings, etc. in the laboratory. For a most recen...

An arbitrary optical waveform can be measured using the technique called the ‘petahertz optical oscilloscope’ in which an electron trajectory in the process of high harmonic generation is used as a fast temporal gate. In the petahertz optical oscilloscope, a signal laser pulse that needs to be measured is superposed on a fundamental laser pulse that generates high harmonic radiation. The additi...

nature photonics | VOL 4 | NOVEMBER 2010 | www.nature.com/naturephotonics Although the electromagnetic spectrum is a continuum, a strong distinction is typically drawn between electronics and optics. This distinction is due, in part, to the very different technologies used for electronics and optics. A further distinction is that electronic devices typically generate and measure electric field ...

we have simulated the carrier concentration and temporal response characteristics of a back-gated metal- semiconductor-metal (bg-msm) photodetector in one dimension as a function of optical pulse position on the active region in an equilibrium condition (without bias voltage to the photodetector). we have adopted a nonlinear ambipolar transport model to simulate the behavior of photo-generated ...

This is a report on a 100 W, 20 mJ, 1 ps Yb:YAG thin-disk regenerative amplifier. A homemade Yb:YAG thin-disk, Kerr-lens mode-locked oscillator with turn-key performance and microjoule-level pulse energy is used to seed the regenerative chirped-pulse amplifier. The amplifier is placed in airtight housing. It operates at room temperature and exhibits stable operation at a 5 kHz repetition rate, ...