Amplitude noise reduction in semiconductor lasers with weak, dispersive optical feedback [PDF]
, 1994 We present the theory and measurements of the amplitude noise spectrum from a semiconductor laser with weak optical feedback (Pfb/Pout ~10^-6) from an external cavity containing an element of dispersive loss.
Boyd, R. +3 more
core +1 more source
Pulsed exposure mode of the 445 nm semiconductor laser in phonosurgery: an experimental study
Biomedical Photonics, 2023 The study presents the results of an experimental study devoted to the choice of the most optimal mode of pulsed contact laser exposure of semiconductor laser with a wavelength of 445 nm in phonosurgery, which implies maximum preservation of anatomically
M. A. Ryabova +4 more
doaj +1 more source
Time-dependent density-functional theory for ultrafast interband excitations [PDF]
, 2007 We formulate a time-dependent density functional theory (TDDFT) in terms of the density matrix to study ultrafast phenomena in semiconductor structures.
C. A. Ullrich +7 more
core +2 more sources
The gain and carrier density in semiconductor lasers under steady-state and transient conditions [PDF]
, 1992 The carrier distribution functions in a semiconductor crystal in the presence of a strong optical field are obtained. These are used to derive expressions for the gain dependence on the carrier density and on the optical intensity-the gain suppression ...
Chen, T. R., Yariv, Amnon, Zhao, Bin
core +1 more source
Large-signal theory of the effect of dispersive propagation on the intensity modulation response of semiconductor lasers [PDF]
, 2000 We have derived an exact large-signal theory of propagation in a dispersive fiber of an optical wave with sinusoidal amplitude and frequency modulation. This has been applied to the study of large-signal direct-modulation of semiconductor lasers.
Peral, Eva, Yariv, Amnon
core +1 more source
Calibration Method for Industrial Robots Based on the Principle of Perigon Error Close
IEEE Access, 2022 For the problem that the self-error of industrial robot calibration device has influence on calibration accuracy, a calibration method of industrial robots based on the principle of Perigon Error Close is proposed.
Xirui Li +3 more
doaj +1 more source
Closed Loop Control of Melt Pool Width in Laser Directed Energy Deposition Process Based on PSO-LQR
IEEE Access, 2023 A closed-loop controller was proposed to adjust the laser power to maintain melt pool stability based on the linear quadratic regulator (LQR) control theory.
Liguo Miao, Fei Xing, Yuanxin Chai
doaj +1 more source
The Surface Photogalvanic and Photon Drag Effects in Ag/Pd Metal-Semiconductor Nanocomposite
Nanomaterials, 2021 We performed the investigation of the polarization-sensitive photocurrent generated in silver-palladium metal-semiconductor nanocomposite films under irradiation with nanosecond laser pulses at the wavelength of 2600 nm.
Aleksandr S. Saushin +3 more
doaj +1 more source
Toward a Feedback-Insensitive Semiconductor Laser
IEEE Journal of Selected Topics in Quantum Electronics, 2019 We present a route toward design and fabrication of a conceptually new type of optical feedback insensitive integrated semiconductor ring laser with a weak optical isolator included in the ring.
D. Lenstra +2 more
semanticscholar +1 more source
Control of Spin Dynamics of Excitons in Nanodots for Quantum Operations
, 2001 This work presents a step furthering a new perspective of proactive control of the spin-exciton dynamics in the quantum limit. Laser manipulation of spin-polarized optical excitations in a semiconductor nanodot is used to control the spin dynamics of two
Chen, Pochung +2 more
core +1 more source