optical feedback
Quantum dot micropillar lasers subject to coherent time delayed optical feedback from a short external cavity
... power-current and spectral characteristics. Firstly, we present the effects of delayed optical feedback from a short cavity on the input-output characteristics and the optical spectrum of a QD ...
8
Steady State Behavior of Semiconductor Laser Diodes Subject to Arbitrary Levels of External Optical Feedback
... external optical feedback by means of an iterative travelling-wave (ITW) ...high feedback levels with re-stabilization of the compound laser ...
7
A model for a pulsed terahertz quantum cascade laser under optical feedback
... The optical feedback model we introduce here draws on and parallels that of an early seminal paper for diode lasers [35], in which terms representing re-injection of photons into the internal cavity are ...
18
Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... of optical feedback these frequency changes result in variations in optical power, indicated by solid lines in ...without optical feedback is indicated by broken lines for ...
14
Model for a pulsed terahertz quantum cascade laser under optical feedback
... Laser feedback interferometry (LFI) with THz QCLs is a recently-developed coherent sensing technique [8–10], ideally-suited to the development of compact sensing sys- tems, in which radiation is reflected back ...
17
Tailoring the mode switching dynamics in quantum dot micropillar lasers via time delayed optical feedback
... without feedback. The addition of feedback, again leads to a strong increase of the characteristic correlation times together with a periodic pattern of minima at multiples of the delay ...currents, ...
14
Numerical Analysis of the Effect of Temperature and External Optical Feedback Variation on the Output Characteristics of External Cavity Semiconductor Laser Based Fiber Bragg Gratings
... external optical feedback (OFB) effects on power characteristics of external cavity semiconductor laser model based fiber Bragg gratings (FBGs) are numerically ...
9
Abrupt turn-on and hysteresis in a VCSEL with frequency-selective optical feedback
... anisotropic optical feedback [17–21]. Frequency selective optical feedback with an appropriate bandwidth could also influence the polarization selection due to the frequency splitting between ...
26
Conditions for reservoir computing performance using semiconductor lasers with delayed optical feedback
... includes optical feedback of the response laser and optical injection modulated at fast ...of optical feedback ...with optical feedback under a cw optical injection ...
12
Inducing tunable single-mode operation of Fabry-Perot semiconductor laser coupled with very-short cavity with selective optical feedback
... strong optical feedback and avoiding the chaotic state [28, ...selective feedback to lock or tune the predicted single-mode oscil- lation could add to the advantages of this coupled laser as a ...
7
Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers
... using optical feedback that have been successfully applied in ...the feedback-induced wavelength shift to access the α-factor ...low feedback ratios [21]. Other feedback methods based ...
9
Cavity-Enhanced Raman Spectroscopy of Natural Gas with Optical Feedback cw-Diode Lasers
... linear optical cavity by a mode matching lens ML with focus length f = 100 cm at a distance of 50 cm to the center of the cavity, e ff ectively narrowing the beam diameter for optimal ...
7
An all optical feedback assisted steady state of an optomechanical array
... the optical cavity under consideration can be altered by the displacement of the mechanical element which may for example form one of the mirrors in a Fabry–Pérot ...the optical and mechanical ...the ...
22
Experimental spatial rogue patterns in an optical feedback system
... The experimental setup in which optical spatial rogue peaks of intensity occur is composed of a Kerr slice medium sub- jected to optical feedback (Fig. 1) (Louvergneaux., 2001). This system ...
6
Nonlinear Dynamics in Directly Modulated Semiconductor Lasers with Optical Loop Mirror Feedback
... chaotic optical commu- nication ...as optical feedback [1], optical injection [2], and optoelec- tronic feedback [3,4], various nonlinear dynamics and routes to chaos have been observed ...
5
An Improved Design for an All Optical Flip Flop Based on a Nonlinear 3 Sections DFB Laser Cavity
... nanosecond. Optical bi-stability loop is shown in Figure ...high optical loss (480 cm −1 ) due to direct absorption) at 0 < < z L 4 and 3 L 4 < < z L the device produces laser output mode over a ...
14
Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers
... of optical feedback within the weak feedback regime, since at moderate to strong optical feedback levels the SM signal was found to be complicated by the presence of multiple cavity ...
13
THz QCL self-mixing interferometry for biomedical applications
... In this paper, we introduce the self-mixing (SM) phenomenon in QCLs and then present recent advancements in the development of coherent THz imaging and sensing systems that exploit the SM effect. We present an imaging ...
12
Separate phase locking and coherent combining of two laser diodes in a Michelson cavity
... We describe a new coherent beam combining architecture based on passive phase-locking of two laser diodes in a Michelson external cavity on their rear facet, and their coherent combination on the front facet. As a ...
10
Tuning a microcavity-coupled terahertz laser
... The achieved tunability is a record for any single-mode surface-emitting THz QCL, and the combined power and slope-efficiency performance provides a valuable alternative to QCL-MEMS configurations for practical ...
5