The langevin noise terms are neglected in the simulations in order to see the pure dynamics of the. Meanwhile, they are easily destabilized by external perturbations introduction of extra degree of freedom. Experimental results show that, asymmetrical bias current level of two mcsls has obvious influence on chaos synchronization between them, and stable leaderlaggard chaos synchronization can be realized under relatively large. Stability, instability and chaos springer series in optical sciences. Only the photons that leave the cavity from the mirrors constitute useful output. We also need expressions for the light coming out of the laser. Nonlinear dynamics of semiconductor lasers with feedback. This third edition of semiconductor lasers, stability, instability and chaos was significantly extended. Pdf nonlinear dynamics of semiconductor lasers with. Stability, instability and chaos springer series in optical sciences ohtsubo, junji on. Interband semiconductor lasers with incoherent optical feedback have been studied theoretically using coupled rate equation models. Small edgeemitting laser diodes generate a few milliwatts or up to 0.
This monograph describes fascinating recent progress in the field of chaos, stability, and instability of semiconductor lasers. With the progress of optical transmission technology, various kinds of semiconductor lasers have been developed for the application to wavelength division multiplexing, high speed, low power consumption, and photonic integration. The semiconductor laser we will model is an algaas channeled substrate planar csp laser with the device characteristics listed in table 4. A lot of research efforts were spent to design high power lasers with alfree active. Dynamics and chaos stabilization of semiconductor lasers with optical feedback from an interferometer article pdf available in ieee journal of quantum electronics 337. The effects of the external feedback on the noise properties of semiconductor laser are studied based on the feedback induceddynamics.
In semiconductor optical amplifiers soas, photons multiplied via stimulated emission. Stability, instability and chaos springer series in optical sciences by ohtsubo, j. Feedback induced instability and chaos in selniconductor. The conventional approach to suppress instabilities is to reduce the level of complexity of the system. Two schemes of chaos synchronizationcomplete and generalized syn. The wavelength spacing of the longitudinal modes varies slowly, and if the laser operates at approximately 1550 nm, the longitudinal modes are separated by about 1. Conditions for reservoir computing performance using.
Dynamics and chaos stabilization of semiconductor lasers. Dynamical and coherent characteristics of semiconductor. Osa chaos synchronization in mutually coupled semiconductor. These dyes can be excited by optically with argon lasers.
Pdf on jun 17, 2015, prasanta kumar basu and others published semiconductor laser theory find, read and cite all the research you. Delay induced high order locking effects in semiconductor. Dynamics and chaos stabilization of semiconductor lasers with. The very broad wavelengthgainbandwidth of semiconductor lasers combined with frequencyfiltered, strong optical feedback create the tunable, single frequency laser systems utilised in telecommunications, environmental sensing, measurement and control. Semiconductor laser is well suited for interface with fiber optic cables used in communication. Semiconductor lasers are class b lasers 06012016 5 governed by two rateequations. Leisher the semiconductor laser was invented in 1962, and has recently become ubiquitous in modern life. Blondel, dynamics of two mutually delayedcoupled semiconductor lasers, optics communications 239, 173180 2004 20. Pdf dynamics of semiconductor lasers with optical feedback. The theoretically predicted effect that polarisationrotated optical feedback should have on the dynamics of semiconductor lasers has not been observed in the majority of the published experimental studies. When semiconductor temperature in the vicinity of mirror.
Different semiconductor laser structures have different thresholds for cod. Tunable semiconductor lasers continue to be in just about everyones list of important components for future fiber optic networks. Fast random bit generation with bandwidthenhanced chaos in. Frequency locking in a semiconductor laser with double.
Feedback induced instability and chaos in selniconductor lasers their applications junji ohtsubo faculty of e,zgineering. For many laser applications, beam stability is critical, but chaotic lasing dynamics can create spatiotemporal instabilities. Use features like bookmarks, note taking and highlighting while reading semiconductor lasers. This book describes the fascinating recent advances made concerning the chaos, stability and instability of semiconducto. Singlemode conventional eels diode lasers are class b lasers. This paper offers an explanation for the observed differences, based on experimental and theoretical investigation of three different optical feedback configurations. Yun liu, junji ohtsubo, and shuying ye dynamical and coherent characteristics of semiconductor lasers with external optical feedback, proc. Pdf theory of optical feedback in semiconductor lasers. Applications and future prospects are discussed in detail. Dynamics and pulsepackage oscillations in broadarea. Chaos synchronization and chaotic signal masking in. This book describes the fascinating recent advances made concerning the chaos, stability and instability of semiconductor lasers, and discusses their applications and future prospects in detail. Str03055pm 1 design of external cavity semiconductor lasers to suppress wavelength shift and mode hopping l. Frequency locking fl in a semiconductor laser with double incoherent optical feedback is experimentally studied, and the characteristics of the locking states are analyzed through comparing the rf spectrum of double incoherent optical feedback and single incoherent optical feedback.
Semiconductor lasers stability, instability and chaos junji ohtsubo. Describe how a semiconductor laser diode works what determines the frequency that is emitted. Synchronization in chaotic verticalcavity surfaceemitting semiconductor lasers natsuki fujiwara and junji ohtsubo faculty of engineering, shizuoka university, 351 johoku, hamamatsu, 4328561 japan abstract chaos synchronization in polarization selected mutually injected verticalcavity surfaceemitting semiconductor. The propagation of incoherent optical feedback in semiconductor lasers is a way to generate chaos where the optical feedback acts only on the carrier density rather than the electric field. Hysteresis induced by strong modulation 38 the figures represents the maxima of the oscillations as a function of the normalized frequency near the onset of hysteresis left, and far away from the onset of hysteresis right. Principle, construction, working, characteristics, advantages, disadvantages and applications it is specifically fabricated pn junction diode. Henry, theory of spontaneous emission noise in open resonators and its application to lasers and optical. The book emphasizes the various dynamics induced in semiconductor lasers by optical and electronic feedback, optical injection, and injection current modulation. Stability, instability and chaos springer series in optical sciences book 111 kindle edition by ohtsubo, junji. Animations of compilations of the rf spectrum from the fft of the timeseries as a function of optical feedback level, injection current and modulation signal strength is. Dynamics and pulsepackage oscillations in broadarea semiconductor lasers with short optical feedback akira takeda,1 rui shogenji,2 and junji ohtsubo2,a 1graduate school of engineering,shizuoka university 351 johoku nakaku hamamatsu 4328561 japan 2faculty of engineering, shizuoka university, 351 johoku, nakaku, hamamatsu 4328561, japan.
The laser gain medium are organic dyes in solution of ethyl, methyl alcohol, glycerol or water. Broadband chaos synchronization in strongly injectionlocked semiconductor lasers with optical feedback junji ohtsubo, koji ohyagi, yoshiro takiguchi proc. Compared to other lasers, diode lasers are cleaved facets very efficient nowadays 100% for the output. Therefore this laser is a natural transmitter of digital data.
Semiconductor laser an overview sciencedirect topics. Nonlinear dynamics of two mutually injected external. A longstanding problem in highpower semiconductor lasers 1 1, 2 2 is that instabilities can arise from deterministic and random effects that control the complex interactions between the radiation field and matter. The steadystate analysis shows that the oscillation mode can be determined from the phase condition in the way that the mode with the maximum stability factor is selected rather than the mode with the minimum excess gain. Stability, instability and chaos, edition 3 ebook written by junji ohtsubo. Prefaceforthesecondedition chaos research in laser physics, especially in semiconductor lasers, has veloped further even after completion of the. The nonlinear dynamics of two semiconductor laser systems. The multistability in a singlemode distributed feedback.
We experimentally demonstrate random bit generation using multibit samples of bandwidthenhanced chaos in semiconductor lasers. Accepted november, 1998 semiconductor laser with feedback is an excellent model for nonlinear optical system which shows chaotic. At first, we investigate the route to chaos for an increase of the external reflectivity by numerical simulations. Download citation on jan 1, 2008, junji ohtsubo and others published semiconductor lasers. Laser structure and principle of operation laser diodes consist of a n diode with an active region where electrons and holes recombine p resulting in light emission.
There is a great variety of different semiconductor lasers, spanning wide parameter regions and many different application areas. Read semiconductor lasers stability, instability and chaos by junji ohtsubo available from rakuten kobo. Fast random bit generation with bandwidthenhanced chaos. This third edition of semiconductor lasers, stability, instability and chaos. Download it once and read it on your kindle device, pc, phones or tablets. Semiconductor lasers stability, instability and chaos. We discuss chaos in lasers and also instability and chaos in semiconductor lasers. Semiconductor laser diode outline this student project deals with the exam question semiconductor laser diode and covers the following questions. Physics and applications of laser diode chaos arxiv. Henry, theory of the linewidth of semiconductor lasers, ieee j. Current topics include fast physical number generation using chaotic semiconductor lasers for secure communication, development of chaos, quantumdot semiconductor lasers and. Synchronization of quantum cascade lasers with mutual. From cost point of view the semiconductor lasers are economical. Semiconductor lasers types, applications, construction.
We experimentally and numerically investigated the chaos synchronization characteristics of mutually coupled semiconductor lasers mcsls with asymmetrical bias currents. Sep 21, 2018 for many laser applications, beam stability is critical, but chaotic lasing dynamics can create spatiotemporal instabilities. Stability, instability and chaos springer series in optical sciences book 111. The laser cavity consists of a waveguide terminated on each end by a mirror. Smaller size and appearance make them good choice for many applications. The most important property of lasers not captured by semiclassical theories, which treat the. The rst pn junction lasers were built in gaas infrared 3 and. I compoundcavity edgeemitting semiconductor lasers 19. Routes to chaos of a semiconductor laser subjected. In soas photons were confined in the dimensions transverse to the. For example, various forms of chaotic dynamics have been applied. This monograph describes fascinating recent progress in the field of chaos, stability and instability of semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensity signal with bandwidth enhanced up to 16 ghz.
Semiconductor lasers with new device structures, such as verticalcavity surfaceemitting lasers and broadarea semiconductor lasers, are interesting devices from the viewpoint of chaotic dynamics since they essentially involve chaotic dynamics even in their freerunning oscillations. Display a stable output with only transient relaxation oscillations. In the previous edition, the dynamics and characteristics of chaos in semiconductor lasers after the introduction of the fundamental theory of laser chaos and chaotic dynamics induced by selfoptical feedback and optical injection was discussed. Semiconductor lasers with new structures, such as verticalcavity surfaceemitting lasers and broadarea semiconductor lasers, are intriguing and promising devices. Synchrony of small nonlinear networks in chaotic semiconductor lasers junji ohtsubo, ryo ozawa, and masashi nanbu graduate school of engineering, shizuoka university, hamamatsu 4328561, japan. The technology incorporates semiconductor laser diodes tiny electronic microchips that operate as lasers. The original concepts of semiconductor lasers dates from 1961, when basov et al. Applications of semiconductor lasers with optical feedback systems are driving rapid developments in theoretical and experimental research.
The semiconductor laser can be pulsed at varying rate and pulse widths. Fabrication and characterization of edgeemitting semiconductor lasers dr. It emphasizes the dynamics in semiconductor lasers by optical and electronic feedback, optical. Delay induced high order locking effects in semiconductor lasers. Fang abstract in this report, a model of external cavity semiconductor laser is built, and then. Nonlinear dynamics of semiconductor lasers with feedback and modulation article pdf available in optics express 1816. This diode emits laser light when it is forward biased.
Mirrors, light sources, semiconductor lasers, solids, laser stabilization, optical storage, laser optics, active optics, pulsed laser operation. Lecture 101 high power diode lasers low power lasers below tenth of mw. This thesis focuses on the development of a semiconductor laser fabricating process which utilizes semiconductor manufacturing technology in a. In addition, a laser diode contains an optical cavity where stimulated emission takes place.