IEEE Journal of Quantum Electronics
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Power scaling of diode-pumped Nd:YVO/sub 4/ lasers
IEEE Journal of Quantum Electronics - Tập 38 Số 9 - Trang 1291-1299 - 2002
The evaluation of pump capability and scaling the output power of Nd:YVO/sub 4/ (vanadate) lasers are presented in this paper. Taking into account thermal fracture limitation and fundamental mode operation, systematic investigations of vanadate crystals have been conducted in an effort to scale the output power of diode-pumped lasers to higher levels. Based on the limitation of pump power, the inp...... hiện toàn bộ
#Diodes #Power generation #Laser modes #Power lasers #Pump lasers #Laser excitation #Laser theory #Thermal conductivity #Crystals #Laser beams
Full vectorial finite-element solution of nonlinear bistable optical waveguides
IEEE Journal of Quantum Electronics - Tập 38 Số 8 - Trang 1120-1125 - 2002
The accurate computation of the propagation constants and field distributions of different modes in nonlinear optical dielectric waveguides is addressed in this paper. Using the vector finite-element formulation of the beam propagation method, combined with the imaginary distance propagation technique, both linear and nonlinear modes can be accurately calculated. The proposed technique is applied ...... hiện toàn bộ
#Optical waveguides #Finite element methods #Nonlinear optics #Optical bistability #Optical propagation #Distributed computing #Optical computing #Propagation constant #Dielectrics #Vectors
Theory and simulation of the dynamics and stability of actively modelocked lasers
IEEE Journal of Quantum Electronics - Tập 38 Số 10 - Trang 1412-1419 - 2002
A new model is proposed for the active modulation component of a mode-locked laser cavity. By using Jacobi elliptic functions to capture the periodic forcing to the cavity, we are able to construct exact solutions representing a mode-locked pulse train. Two families of pulse-train solutions are generated: one in which neighboring pulses are in-phase and a second in which neighboring pulses are out...... hiện toàn bộ
#Laser stability #Laser modes #Laser theory #Laser mode locking #Optical pulse generation #Erbium-doped fiber lasers #Optical fiber polarization #Optical pulses #Optical attenuators #Pulse amplifiers
Nonlinear modes, resonant trapping, and soliton emission in engineered PPLN structures
IEEE Journal of Quantum Electronics - Tập 38 Số 10 - Trang 1309-1316 - 2002
We investigate nonlinear waveguiding effects, due to second-order nonlinearity, in quasi-phase-matching (QPM) structures in periodically poled lithium niobate (PPLN) with engineered patterns. We specifically study the existence and the propagation of pure nonlinear guided modes in QPM gratings with different domain lengths in different transverse regions of the medium, without any waveguiding effe...... hiện toàn bộ
#Resonance #Lithium niobate #Nonlinear optics #Optical solitons #Gratings #Optical refraction #Optical signal processing #Ultrafast optics #Optical frequency conversion #Optical materials
Observation of acetylene molecular absorption line with tunable, single-frequency, and mode-hop-free erbium-doped fiber ring laser
IEEE Journal of Quantum Electronics - Tập 38 Số 10 - Trang 1325-1330 - 2002
We succeeded in observing one of the absorption lines of acetylene [P(16)] using an erbium-doped fiber-ring laser, which is the first such observation using a fiber-ring laser. The observed linewidth of the P(16) linear absorption was approximately 450 MHz. Mode competition and mode hopping were suppressed by using an ultra narrow-band fiber Bragg grating and a Fabry-Perot filter in the ring laser...... hiện toàn bộ
#Absorption #Tunable circuits and devices #Erbium-doped fiber lasers #Laser modes #Ring lasers #Laser tuning #Linear approximation #Narrowband #Fabry-Perot #Filters
Nanoheteroepitaxy for the integration of highly mismatched semiconductor materials
IEEE Journal of Quantum Electronics - Tập 38 Số 8 - Trang 1017-1028 - 2002
We describe an ongoing study of nanoheteroepitaxy (NHE), the use of nanoscale growth-initiation areas for the integration of highly mismatched semiconductor materials. The concept and theory of NHE is briefly described and is followed by a discussion of the design and fabrication by interferometric lithography of practical sample structures that satisfy the requirements of NHE. Results of NHE grow...... hiện toàn bộ
#Semiconductor materials #Substrates #Gallium nitride #Lattices #Optical materials #Capacitive sensors #Sun #Strain measurement #Optical devices #Nanostructured materials
Accurate methods for study of light emission from quantum wells confined in a microcavity
IEEE Journal of Quantum Electronics - Tập 38 Số 8 - Trang 1031-1038 - 2002
Photomodulated reflectance (PR) and conventional reflectance studies have been performed on an InGaP/AlGaInP/Al/sub x1/Ga/sub y1/As/Al/sub x2/Ga/sub y2/As resonant-cavity light emitting diode structure in the red spectral region. The PR spectra show prominent signals from the Fabry-Perot cavity mode and the quantum-well (QW) ground state excitonic transition. This high-precision technique, and its...... hiện toàn bộ
#Potential well #Microcavities #Reflectivity #Vertical cavity surface emitting lasers #Distributed Bragg reflectors #Light emitting diodes #Temperature #Resonance #Optical transmitters #Quantum wells
Compact Nd:YVO/sub 4/ lasers with pulse repetition rates up to 160 GHz
IEEE Journal of Quantum Electronics - Tập 38 Số 10 - Trang 1331-1338 - 2002
We present a comprehensive study on multigigahertz repetition rate Nd:YVO/sub 4/ lasers, passively mode-locked with semiconductor saturable absorber mirrors. A brief review of Q-switching instabilities with special emphasis on high repetition rate is given. We then present basic design guidelines, and experimentally show that one can push the pulse repetition rate of a Nd: YVO/sub 4/ laser up to 1...... hiện toàn bộ
#Pulse amplifiers #Laser mode locking #Semiconductor lasers #Optical pulses #Neodymium #Solid lasers #Power generation #Optical pulse generation #Mirrors #Optical design
Multi-reentrant nonplanar ring laser cavity
IEEE Journal of Quantum Electronics - Tập 38 Số 10 - Trang 1301-1308 - 2002
A multi-reentrant nonplanar ring laser cavity configuration is presented. Two identical spherical mirrors were used to construct the laser cavity. The exact reentrant condition of the ring cavity is derived and the stability of the laser cavity is analyzed. Although slight astigmatism can arise from the intracavity elements, the cavity itself is astigmatism-free. Linear output polarization is read...... hiện toàn bộ
#Ring lasers #Laser noise #Laser beams #Laser stability #Mirrors #Stability analysis #Vision defects #Polarization #Neodymium #Optical control
CHD/sub 2/OH optically pumped by a waveguide CO/sub 2/ laser: new far-infrared laser lines from the CD/sub 2/ wagging vibrational mode
IEEE Journal of Quantum Electronics - Tập 38 Số 8 - Trang 1029-1030 - 2002
For the first time, a wide tunability waveguide CO/sub 2/ laser was used to pump the CHD/sub 2/OH molecule for the generation of new FIR laser lines with a large offset. Optoacoustic signals associated with the infrared absorbing transitions of the CD/sub 2/ wagging vibrational mode served as a guide for finding new laser lines. All lines were characterized in wavelength, relative polarization, in...... hiện toàn bộ
#Optical waveguides #Pump lasers #Waveguide lasers #Optical pumping #Laser excitation #Laser transitions #Finite impulse response filter #Laser tuning #Optical resonators #Laser modes
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