Erbium-implanted high-Q silica toroidal microcavity laser
... intrinsic signal quality factor and Giles parameters. For ultrahigh-Q factor, it is set near ␣s / 共␣s + gs*兲 = 0.39 (determined by Giles parameters and therefore varying with lasing wavelength). At each preassumed lasing wavelength, a possible minimum N2 / NT is defined by ␣s / 共␣s + gs*兲, below whi ...
... intrinsic signal quality factor and Giles parameters. For ultrahigh-Q factor, it is set near ␣s / 共␣s + gs*兲 = 0.39 (determined by Giles parameters and therefore varying with lasing wavelength). At each preassumed lasing wavelength, a possible minimum N2 / NT is defined by ␣s / 共␣s + gs*兲, below whi ...
sensors Chemical Sensing Using Fiber Cavity Ring-Down Spectroscopy
... volumes of tens to hundreds of milliliters. Measurements on liquid samples require either filling the entire cavity with liquid [7,8] or placing the sample into a part of the optical cavity, e.g., contained by a cuvette [9-12], or in a free flowing liquid sheet [13,14]. In the latter experiments the ...
... volumes of tens to hundreds of milliliters. Measurements on liquid samples require either filling the entire cavity with liquid [7,8] or placing the sample into a part of the optical cavity, e.g., contained by a cuvette [9-12], or in a free flowing liquid sheet [13,14]. In the latter experiments the ...
High-Temperature Operation of Terahertz Quantum Cascade Laser
... rials or photoconductive switches), has a demonstrated potential in some of these areas [1], [2]. However, further development of THz systems will require compact semiconductor-based sources: there currently exist no room temperature, high-power, widely tunable THz sources that are suitable for prod ...
... rials or photoconductive switches), has a demonstrated potential in some of these areas [1], [2]. However, further development of THz systems will require compact semiconductor-based sources: there currently exist no room temperature, high-power, widely tunable THz sources that are suitable for prod ...
Far-infrared-driven electron-hole correlations in a quantum dot with an internal... Roger Sakhel, Lars Jo¨nsson, and John W. Wilkins
... In this paper, we introduce an AlGaAs tunneling barrier in the dot and show how the barrier width can be used to tune the correlation effects and how FIR laser pulses can be used to probe the coherent time-dependent correlations in states that are not accessible by direct optical excitation. For exa ...
... In this paper, we introduce an AlGaAs tunneling barrier in the dot and show how the barrier width can be used to tune the correlation effects and how FIR laser pulses can be used to probe the coherent time-dependent correlations in states that are not accessible by direct optical excitation. For exa ...
Classical and quantum dynamics of optical frequency conversion
... experiment. Design criteria are given that allow TROPO to be avoided in future efficient SHG systems. The second harmonic squeezing is observed to be degraded by TROPO, with a maximum value occurring just before the onset of TROPO – in contrast to predictions for closely related systems. A model is ...
... experiment. Design criteria are given that allow TROPO to be avoided in future efficient SHG systems. The second harmonic squeezing is observed to be degraded by TROPO, with a maximum value occurring just before the onset of TROPO – in contrast to predictions for closely related systems. A model is ...
Role of wavefront aberrations of amplified femtosecond pulses in
... Basic concepts of nonlinear optics .............................................. 53 3.1. Introduction........................................................................................................................... 53 3.2. Frequency mixing processes ....................................... ...
... Basic concepts of nonlinear optics .............................................. 53 3.1. Introduction........................................................................................................................... 53 3.2. Frequency mixing processes ....................................... ...
Development of a Tm3+-doped Fluoride Glass - DORAS
... power in the visible at 632.8 nm. Argon lases mainly in the green, blue-green (514.4 nm and 488 nm), and such lasers are used in either pulsed or continuous operation. All of the noble gases (He, Ne, Ar, Kr, Xe) have been made to lase individually. The C 0 2 laser, which lases at 10.6 ^m, offers hig ...
... power in the visible at 632.8 nm. Argon lases mainly in the green, blue-green (514.4 nm and 488 nm), and such lasers are used in either pulsed or continuous operation. All of the noble gases (He, Ne, Ar, Kr, Xe) have been made to lase individually. The C 0 2 laser, which lases at 10.6 ^m, offers hig ...
The Development of Femtosecond Electron Diffraction for
... bonds and the rearrangement of atoms, which occurs on the time scale of an atomic vibrational period, hundreds of femtoseconds. Atomic motion on this time scale ultimately determines the course of phase transitions in solids, the kinetic pathways of chemical reactions, and even the function of biolo ...
... bonds and the rearrangement of atoms, which occurs on the time scale of an atomic vibrational period, hundreds of femtoseconds. Atomic motion on this time scale ultimately determines the course of phase transitions in solids, the kinetic pathways of chemical reactions, and even the function of biolo ...
What does it mean for half of an empty cavity to be full?
... tracing out a spatial region of a vacuum field. That is, because there is entanglement between spatial regions, the reduced state of such a region must necessarily be mixed (and, therefore, excited). This thus motivates the idea that at least one possible way of measuring these excitations is to iso ...
... tracing out a spatial region of a vacuum field. That is, because there is entanglement between spatial regions, the reduced state of such a region must necessarily be mixed (and, therefore, excited). This thus motivates the idea that at least one possible way of measuring these excitations is to iso ...
Optimisation of Quantum Trajectories Driven by Strong-Field
... Quasi-free field-driven electron trajectories are a key element of strong-field dynamics. Upon recollision with the parent ion, the energy transferred from the field to the electron may be released as attosecond duration XUV emission1,2 in the process of high harmonic generation (HHG). The conventio ...
... Quasi-free field-driven electron trajectories are a key element of strong-field dynamics. Upon recollision with the parent ion, the energy transferred from the field to the electron may be released as attosecond duration XUV emission1,2 in the process of high harmonic generation (HHG). The conventio ...
Local-Field Effects and Nanostructuring for Controlling Optical
... My Ph. D. thesis is devoted to the investigation of the methods for controlling and improving the linear and nonlinear optical properties of materials. Within my studies, two approaches are considered: nanostructuring and invoking local-field effects. These broad topics involve various projects that ...
... My Ph. D. thesis is devoted to the investigation of the methods for controlling and improving the linear and nonlinear optical properties of materials. Within my studies, two approaches are considered: nanostructuring and invoking local-field effects. These broad topics involve various projects that ...
Mode-locking
Mode-locking is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, on the order of picoseconds (10−12 s) or femtoseconds (10−15 s).The basis of the technique is to induce a fixed-phase relationship between the longitudinal modes of the laser's resonant cavity. The laser is then said to be 'phase-locked' or 'mode-locked'. Interference between these modes causes the laser light to be produced as a train of pulses. Depending on the properties of the laser, these pulses may be of extremely brief duration, as short as a few femtoseconds.