scholarly journals Зависимость спектра генерации и синхронизации мод от ширины запрещенной фотонной зоны в гетеролазерах класса С с распределенной обратной связью волн в резонаторе Фабри-Перо

2021 ◽  
Vol 55 (9) ◽  
pp. 758
Author(s):  
Е.Р. Кочаровская ◽  
В.А. Кукушкин ◽  
А.В. Мишин ◽  
Вл.В. Кочаровский ◽  
В.В. Кочаровский
Keyword(s):  
Numerical Solution ◽  
Photonic Band Gap ◽  
Spectral Width ◽  
Mode Locking ◽  
Periodic Sequence ◽  
Distributed Feedback ◽  
External Modulation ◽  
Fabry Perot ◽  
Propagating Waves ◽  
Photonic Band

Based on the numerical solution to the nonlinear Maxwell-Bloch equations, the joint implementation of active (parametric) and passive (coherent) mode locking for a class C heterolaser with a low-Q combined Fabry-Perot cavity in the presence of an effective distributed feedback of counter-propagating waves is demonstrated. It is shown that the multiplicity of the spectral width of the photonic band gap of the cavity to the intermode spacing far from this zone contributes to the effective phasing of quasi-monochromatic quasi-equidistant modes, thus making it possible a phenomenon of parametric coherent self-mode-locking. A number of examples are used to demonstrate typical properties of a quasi-periodic sequence of soliton-like pulses generated in the found regime, which does not require external modulation of the pump or laser parameters, or the placement of a fast-saturating absorber in it.

scholarly journals Features of mode selection in a combined Fabry-Perot cavity with distributed feedback of counter-propagating waves

2019 ◽  
Vol 30 ◽  
pp. 08009
Author(s):  
Ekaterina Kocharovskaya ◽  
Alexey Mishin ◽  
Ivan Ryabinin
Keyword(s):  
Mode Selection ◽  
Resonant Interaction ◽  
Inhomogeneous Broadening ◽  
Distributed Feedback ◽  
Laser Generation ◽  
Absorbing Medium ◽  
High Q ◽  
Or Groups ◽  
Fabry Perot ◽  
Propagating Waves

An analysis is made of the possibility of isolating relatively high-Q modes or groups of such modes in low-Q combined Fabry-Perot cavities with distributed feedback of counter-propagating waves in order to ensure resonant interaction of the electromagnetic field with the polarization oscillations of an amplifying or absorbing medium filling the cavity. We considered two-level active media with homogeneous or inhomogeneous broadening of a spectral line, which can be both smaller or larger than the photon bandgap of a cavity. Particular attention is paid to the change in the well-known spectrum of polariton modes which takes place due to the transition from an absorbing to an amplifying medium under conditions that allow the realization of spontaneous or laser generation of the so-called superradiant modes.

scholarly journals Особенности одновременной генерации низко- и высокодобротных мод в гетеролазерах на квантовых точках с большим временем некогерентной релаксации оптических дипольных колебаний

2019 ◽  
Vol 53 (10) ◽  
pp. 1329
Author(s):  
Е.Р. Кочаровская ◽  
А.В. Мишин ◽  
И.С. Рябинин ◽  
В.В. Кочаровский
Keyword(s):  
Quantum Dots ◽  
Relaxation Time ◽  
Population Inversion ◽  
Dynamical Behavior ◽  
Inhomogeneous Broadening ◽  
Distributed Feedback ◽  
Fabry Perot ◽  
Propagating Waves ◽  
State Generation ◽  
Simultaneous Lasing

We investigate the features of multimode steady-state generation of the superradiant heterolasers which have an active medium formed by the quantum dots with long incoherent relaxation time and a cavity of a combined Fabry-Perot type with a distributed feedback of the counter-propagating waves. We show that a quantum-coherent dynamics of the optical dipole oscillations and a population inversion of the working levels in an ensemble of the quantum dots with a strong inhomogeneous broadening of a spectral line may lead to a simultaneous lasing of modes with a various degree of phasing and/or correlation and with qualitatively different dynamical behavior, including quasi-stationary, metastable, self-modulated, pulsed-periodic, quasi-chaotic ones.

Fabrication of Flexible One-Dimensional Porous Silicon Photonic Band-Gap Structures

2003 ◽  
Vol 797 ◽  
Author(s):  
Natalya Tokranova ◽  
Bai Xu ◽  
James Castracane
Keyword(s):  
Refractive Index ◽  
Porous Silicon ◽  
Photonic Crystals ◽  
Band Gap ◽  
Dielectric Material ◽  
Photonic Band Gap ◽  
Bragg Reflector ◽  
One Dimensional ◽  
Fabry Perot ◽  
Photonic Band

Photonic crystals are periodic dielectric structures that have a photonic band gap to control the propagation of light in a certain wavelength range. This property offers a means to manipulate photons in the same way as electrons can be controlled in an atomic lattice. Porous silicon is an ideal candidate fo r the fabrication of photonic crystals because of the availability of a variety of silicon micromachining techniques. One-dimensional photonic crystals with customized parameters can be economically fabricated using porous silicon multilayer structures with periodically modulated porosity. Despite the structural non-homogeneities, porous silicon fabricated on a p-type Si substrate has optical properties similar to a dielectric material with a single effective refractive index. The exact value of the refractive index for each layer depends on its porosity. An engineered porosity can be obtained by changing the etching currents during the anodization process. This results in a modulation of the refractive index. A stack of alternating layers with high and low porosity produces a distributed Bragg reflector (DBR). Various designs incorporating multilayer porous silicon structures with an optical Fabry-Perot resonator and coupled microcavities are under development and can serve as an optical filter. Prototypes of such free-standing structures with 21–200 stacked layers to be used as DBRs, Fabry-Perot resonators or coupled microcavities are being fabricated. These structures are coated with polystyrenesulfonate on their backsides to increase mechanical strength and at the same time maintain flexibility. In this work, reflectance spectra of these porous silicon multilayers with and without polymer on the backside were measured. Simulations of the multilayer one-dimensional photonic crystals were performed to predic t the reflectance spectrum and optimize their structures before the fabrication and to compare to experimental data.

Controlling emission using one dimensional integrated photonic fluorescent collectors

MRS Advances ◽  
2015 ◽  
Vol 1 (59) ◽  
pp. 3909-3914
Author(s):  
Thomas S. Parel ◽  
Tomas Markvart
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Total Internal Reflection ◽  
Photonic Band Gap ◽  
Edge Emission ◽  
Photon Transport ◽  
One Dimensional ◽  
Fabry Perot ◽  
Fluorescent Molecules ◽  
Photonic Band

ABSTRACTIt is known that photonic crystals can be used to suppress spontaneous emission. This property of photonic crystals has been investigated for suppressing and decreasing the propagation of photons within loss cones in fluorescent collectors. Fluorescent collectors can concentrate light onto solar cells by trapping fluorescence through total internal reflection. In an ideal fluorescent collector the major obstacle to efficient photon transport is the loss of photons through the top and bottom escape cones. One possible method to decrease this loss and improve the efficiency of these devices is to fabricate one-dimensional photonic crystals doped with fluorescent molecules. If these photonic crystals are tuned to exhibit a photonic band gap in the escape cone directions and at the emission frequencies of the fluorescent molecules, a suppression of the escape cone emission and an enhancement of the edge emission is expected. In this paper, we detail the fabrication of a one dimensional integrated photonic collector and show the suppression of the escape cone emission. This suppression of the escape cone will be shown to correspond to the photonic band gap and the modifications to the edge emission will be shown to correspond well with so called Fabry Perot modes. The control of emission inside fluorescent collectors opens up a number of additional possibilities for efficiency enhancements that will also be discussed.

scholarly journals One Dimensional Polymeric Organic Photonic Crystals for DFB Lasers

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
F. Scotognella ◽  
A. Monguzzi ◽  
M. Cucini ◽  
F. Meinardi ◽  
D. Comoretto ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Band Gap ◽  
Incidence Angle ◽  
Distributed Feedback ◽  
Simple Method ◽  
One Dimensional ◽  
Angle Dependence ◽  
Dfb Laser ◽  
Photonic Density ◽  
Photonic Band

We present a very simple method to realize a one-dimensional photonic crystal (1D PC), consisting of a dye-doped polymeric multilayer. Due to the high photonic density of states at the edges of the photonic band-gap (PBG), a surface emitting distributed feedback (DFB) laser is obtained with this structure. Furthermore, the incidence angle dependence of the PBG of the polymeric multilayer is reported.

Conventional band demultiplexer with high quality factor and transmission power based on four optimized shaped photonic crystal resonators

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Fateh Larioui ◽  
Mohamed Redha Lebbal ◽  
Touraya Bouchemat ◽  
Mohamed Bouchemat
Keyword(s):  
Quality Factor ◽  
Filter Design ◽  
Photonic Band Gap ◽  
Transmission Band ◽  
High Sensitivity ◽  
Spectral Width ◽  
Optical Quality ◽  
Transmission Ratio ◽  
Plane Wave Method ◽  
Photonic Band

AbstractIn this work, we propose a new filter design based on a ring resonator. This structure has 99% transmission ratio and high sensitivity to detect small refractive index variations of the order of 0.002. More specifically, the small size of this resonator gives the advantage to model a demultiplexer of size 463 µm2 based on four ports which operates in the conventional transmission band. Also, we show that our demultiplexer structure can reach more than 90% transmission ratio with an optical quality factor of about 3800, the spectral width is 0.72 nm and a crosstalk between −13.28 and −32.13. In our study, we emphasized the plane wave method to study the photonic band gap and FDTD to determine the transmission spectrum.

A Natural Humidity Sensitive Two-dimensional Tunable Photonic Band Gap Material and its Optic Properties

2009 ◽  
Vol 24 (1) ◽  
pp. 57-60 ◽  
Author(s):  
Wei-Gang ZHANG ◽  
Jun YAN ◽  
Gang WANG ◽  
Hao-Xuan LI ◽  
Gang-Sheng ZHANG
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Two Dimensional ◽  
Photonic Band Gap Material ◽  
Photonic Band
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