# IEEE Journal of Quantum Electronics

## Filter Results

Displaying Results 1 - 25 of 29
• ### Optoelectronic properties of semiconductor lasers butt-coupled to optical fibers

Publication Year: 1988, Page(s):2039 - 2045
Cited by:  Patents (6)
| | PDF (560 KB)

The authors have theoretically and experimentally examined the electrical noise properties of a semiconductor laser coupled to a single-mode fiber with a plane endface. It is found that the performance of semiconductor lasers butt-coupled to optical fibers critically depends on the axial position of the fiber. Measurements show that the influence of the fiber may change the output power as much as... View full abstract»

• ### Simple design rules for single-lobe operation of (evanescently coupled) index-guided phase-locked arrays of diode lasers

Publication Year: 1988, Page(s):2034 - 2038
Cited by:  Papers (10)
| | PDF (424 KB)

The author presents both a simple yet very accurate Gaussian beamwaist approximation for the fundamental mode of the symmetric slab waveguide as well as simple design criteria for virtual, sing-lobe operation of phase-locked arrays of diode lasers. Closed-form analytic expressions, involving all parameters characteristic of index-guided, uniform arrays, are determined for the condition that at lea... View full abstract»

• ### Analysis, design, and fabrication of GaAlAs/GaAs DFB lasers with modulated stripe width structure for complete single longitudinal mode oscillation

Publication Year: 1988, Page(s):2017 - 2033
Cited by:  Papers (25)  |  Patents (9)
| | PDF (1444 KB)

Complete single longitudinal mode operation of a GaAlAs/GaAs distributed-feedback (DFB) laser has been accomplished by making use of a modulated stripe width (MSW) structure, which is characterized by its simple configuration and versatility, compared with equivalent schemes. The coupled-mode equations are transformed into the characteristic equation for the DFB laser with arbitrary index modulati... View full abstract»

• ### Computer modeling of the electric field dependent absorption spectrum of multiple quantum well material

Publication Year: 1988, Page(s):2007 - 2016
Cited by:  Papers (94)  |  Patents (1)
| | PDF (856 KB)

The authors present a simple computer model for the electric field dependence of the absorption of semiconductor multiple-quantum-well (MQW) structure that will be used to optimize the performance of MQW modulators. This model has been compared to absorption spectra derived from photocurrent measurements on a GaAs/(GaAl)As MQW p-i-n diode and it has been found that the well-established Stark shift... View full abstract»

• ### Calculated electron and hold spatial ionization profiles in bulk GaAs and superlattice avalanche photodiodes

Publication Year: 1988, Page(s):2001 - 2006
Cited by:  Papers (12)
| | PDF (516 KB)

The author presents ensemble Monte Carlo calculations of the electron and hole spatial and temporal impact ionization profiles in bulk GaAs and GaAs-AlGaAs superlattice structures. The results indicate that transient effects are much more pronounced for electrons than for holes, which greatly influences the dynamics of each type. It is concluded that the heterointerface plays less of a role in the... View full abstract»

• ### Measurement of Raman scattering in single-mode optical fiber by optical time-domain reflectometry

Publication Year: 1988, Page(s):1973 - 1975
Cited by:  Papers (9)  |  Patents (1)
| | PDF (192 KB)

The measurement of the Raman scattering in a single-mode optical fiber using optical time-domain reflectometry (OTDR) is reported. The OTDR technique makes it possible to determine the power level of the pump and Stokes components along the fiber without cutting it back, and to estimate Raman scattering parameters in a reliable manner. The measurement method is described and experimental results a... View full abstract»

• ### Molecular orbital topology and optical properties of gallium arsenide clusters

Publication Year: 1988, Page(s):1996 - 2000
Cited by:  Patents (1)
| | PDF (444 KB)

The oscillator strength is expressed in terms of a density matrix formulation for optical absorption and is calculated for a GaAs cluster by using the self-consistent-field Xα-scattered wave cluster molecular orbital method. The discrete value of oscillator strength due to optical excitation defined by the selection rule leads to a model of the fundamental nature of the excitonic absorption ... View full abstract»

• ### Optical multistability using optoelectronic feedback

Publication Year: 1988, Page(s):2063 - 2069
Cited by:  Papers (9)
| | PDF (600 KB)

An optical multistable device with good tuning capability was experimentally realized by using a semiconductor light-emitting device, a photodiode, and transistors with positive optoelectronic feedback. By tuning the cutoff current of each stage, optical multiple bistable and multistable loop characteristics are realized. In this device, the number of stable states is determined by the number of t... View full abstract»

• ### Frequency measurement of a CH4 hyperfine line at 88 THz/optical clock'

Publication Year: 1988, Page(s):1970 - 1972
Cited by:  Papers (28)
| | PDF (276 KB)

A frequency-measurement chain was used to measure the frequency of a hyperfine line of the ν3P(7) CH4 multiplet, which was resolved by a linear optical Ramsey resonance technique. A frequency of 88, 376, 181, 599.7±1 kHz is found. The Ramsey experiment was used as a clock; to ~100 s the stability of this optical clock is equal to a high-performance commercial Cs clo... View full abstract»

• ### Optical charge modulation as an internal voltage probe for CMOS ICs

Publication Year: 1988, Page(s):1981 - 1984
Cited by:  Papers (6)
| | PDF (292 KB)

The use of optical charge modulation of refractive index as a probe for internal voltages in CMOS integrated circuits is examined. The Kramers-Kronig relations are used to calculate the index of refraction from absorption coefficient measurements. Both free-carrier depletion and the internal electric field of the p-n junction modulator are shown to affect the measurement sensitivity of this techni... View full abstract»

• ### The effect of optical feedback on the relaxation oscillation in semiconductor lasers

Publication Year: 1988, Page(s):1989 - 1995
Cited by:  Papers (31)  |  Patents (2)
| | PDF (492 KB)

The influence of weak optical feedback on the relaxation oscillation in semiconductor lasers is studied both theoretically and experimentally. In the approximation used the frequency branches of the relaxation oscillation are described by multiples of the fundamental frequency of the external cavity. However, especially for the low multiples, the deviation from this behavior is quite pronounced. T... View full abstract»

• ### Rapid beam scanning using a mode-locked laser-driven laser array

Publication Year: 1988, Page(s):1955 - 1957
Cited by:  Papers (1)
| | PDF (200 KB)

A scheme for driving a laser-array with the spatially dispersed spectral components of a mode-locked laser to achieve very rapid (⩽1 ns) beam scanning is outlined. In the proposed scheme, the precisely-timed periodic pulse train generated by a mode-locked picosecond laser is used as the injection-locking source for the separate lasers of an uncoupled laser array. In a mode-locked picosecond la... View full abstract»

• ### Comments on Gaussian beams are fundamentally different from free-space modes' by E.A.J. Marcatili and C.G. Someda

Publication Year: 1988, Page(s):2130 - 2131
| | PDF (172 KB)

The commenter makes three points about the above-named work (see ibid., vol.QE-23, p.164-7, 1987). Specifically, he points out an apparently contradictory statement, gives another explanation for the interference-like pattern observed at the focus of an optical instrument as a result of excitation of higher modes, and explains why he is of the opinion that the Gaussian beam is a mode of propagatio... View full abstract»

• ### Solitons in dispersion-compensated optical fibers with loss

Publication Year: 1988, Page(s):2059 - 2062
Cited by:  Papers (9)
| | PDF (232 KB)

A dispersion-compensated optical fiber is proposed for optical soliton propagation. The scheme is studied by a variational approach. Numerical analyses show that the proposed scheme can retain the soliton property for a much longer distance than normal systems. It is shown that, after 48 km, the pulsewidth in the proposed system remains similar to the initial pulsewidth, whereas in the normal syst... View full abstract»

• ### Nonlinear TE waves in an optically nonlinear curved waveguide and pulse compression

Publication Year: 1988, Page(s):1966 - 1969
Cited by:  Papers (9)
| | PDF (268 KB)

The propagation properties of the TE0 mode in an optically nonlinear curved waveguide are examined in detail. As the input power increases, the self-focusing effect of the nonlinear core is found to largely reduce the radiation loss and to moderately reduce the mode-conversion loss. It is made clear from detailed examinations of the power transmissivity that the nonlinear curved guide c... View full abstract»

• ### Gas contaminants produced in electron-beam-pumped XeF lasers

Publication Year: 1988, Page(s):2121 - 2126
Cited by:  Papers (6)
| | PDF (548 KB)

To achieve extended gas lifetime in electron-beam (e-beam)-pumped XeF lasers requires knowledge of the gas contaminants produced as a result of homogeneous reactions within the gas mixture and heterogeneous reactions with the laser device materials (e.g. walls and foil). The authors present mass-spectrometer measurements of the contaminants created in an e-beam-pumped XeF laser (... View full abstract»

• ### Asymmetric semiconductor waveguide with defocusing nonlinearity

Publication Year: 1988, Page(s):2046 - 2051
Cited by:  Papers (13)
| | PDF (472 KB)

A novel nonlinear waveguide structure capable of implementation in multiquantum well material is analyzed. It is shown that the defocusing nonlinearity associated with the fundamental absorption edge of semiconductor material imposes a basic design requirement on the waveguide structure. Results for a specific structure designed for operation at a wavelength of 1.55 μm show a form of optical li... View full abstract»

• ### Hooting modes in a CO2 waveguide laser

Publication Year: 1988, Page(s):1976 - 1980
Cited by:  Papers (7)
| | PDF (448 KB)

CO2 waveguide lasers `hoot' when, instead of the solitary resonator mode expected from a homogeneously broadened gas laser, two or more resonator transverse modes laser simultaneously on a common laser line. The unwanted mode or modes, even if very faint and present only occasionally, can impede heterodyne measurements where a clean frequency spectrum is required. The authors report mea... View full abstract»

• ### Numerical solution of four-wave mixing in passive phase conjugate mirrors

Publication Year: 1988, Page(s):2070 - 2075
Cited by:  Papers (3)
| | PDF (412 KB)

An iterative method is used to find the solution for all the field amplitudes and for the detuning of oscillations arising in a linear passive phase conjugate mirror (PPCM). The effect of crystal absorption is included and both transmission and reflection gratings are investigated. In particular, it is shown that a PPCM can be realized with the aid of a BSO crystal in the presence of an applied el... View full abstract»

• ### Non-Gaussian statistics of frequency fluctuations in line-narrowed semiconductor lasers

Publication Year: 1988, Page(s):1985 - 1988
Cited by:  Papers (3)
| | PDF (288 KB)

The statistics of the instantaneous frequency fluctuations of CW narrowed-linewidth single-mode semiconductor lasers are studied under the most general conditions. In the case in which the rate equations describing the evolution of the system cannot be linearized the statistics are found to deviate appreciably from a Gaussian distribution. A Monte Carlo simulation is shown to give results in good ... View full abstract»

• ### Quantum-mechanical constraints on electron-beam brightness

Publication Year: 1988, Page(s):1958 - 1962
Cited by:  Papers (1)
| | PDF (360 KB)

Bounds on the brightness and quality of fermion beams are derived from Pauli's exclusion principle and the finite density of quantum eigenstates for free fermions. These bounds are applied to electron-beam sources to derive limitations on the quality (γJ/Δγz) of the electron beams they generate. In the absence of electromagnetic fields, the quality of a relati... View full abstract»

• ### Autocorrelation of short pulses using a single-mode fiber

Publication Year: 1988, Page(s):2127 - 2129
| | PDF (196 KB)

The use of a single-mode fiber as the nonlinear medium in a second-harmonic-generation (SHG) autocorrelator to measure picosecond optical pulses is demonstrated. This is made possible by the fact that the frequency doubling in fibers is a second-order parametric process for IR input power less than 6 kW. Measurements of the IR-input-power dependence of the SHG are also described View full abstract»

• ### Nonlinear waves in saturable self-focusing thin films bounded by linear media

Publication Year: 1988, Page(s):2052 - 2058
Cited by:  Papers (17)
| | PDF (392 KB)

Nonlinear guided wave behavior in the symmetric and asymmetric versions of an optical waveguide is studied. The waveguides are made to cut off at low field intensities by a step-index decrement in the dielectric constant of the film relative to those of the bounding media. The influence of this decrement on solutions of the TE0 mode is calculated. The mode index variation of the asymmet... View full abstract»

• ### Measurement of Raman gain coefficients of hydrogen, deuterium, and methane

Publication Year: 1988, Page(s):2076 - 2080
Cited by:  Papers (42)  |  Patents (2)
| | PDF (388 KB)

The authors report measurements of the absolute Raman gain of H 2 Q(1), D2 Q(2), and CH4 (ν1) at 532 nm using a Raman oscillator/amplifier arrangement. Experimentally determined steady-state gain coefficients are compared to values calculated using spectroscopic data. The dependence of the observed gain on the pressure mismatch in a... View full abstract»

• ### Coupling coefficients for partially meltback trapezoidal gratings

Publication Year: 1988, Page(s):1963 - 1965
Cited by:  Papers (2)  |  Patents (1)
| | PDF (172 KB)

In distributed-feedback or distributed Bragg reflector lasers, the coupling coefficient K describing the grating feedback strength is an important parameter which must be optimized. The author presents a simple way to take into account the grating deformation likely to occur during regrowth and computes corresponding coupling coefficients for optimum first- and second-order, dry- and wet-... View full abstract»

## Aims & Scope

The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Prof. Hon Ki Tsang
Chinese University of Hong Kong