Nonlinear dynamics in semiconductor ring lasers with. These feedback effects impact all semiconductor lasers equally, from fabryperot fp to dfb and dbr lasers. In 1994, a new type of semiconductor laser that did not have a builtin pn junction was demonstrated 3. The idea of the delay feedback control of chaos was. Distributed feedback dfb structures and semiconductor dfb lasers. Numerical analysis of external feedback concepts for. The nonlocal time evolution caused by the feedback createsin combination with the nonlinearity of the lasernew dynamical regimes. In these applications, the laser is commonly connected to complex circuits to obtain the desired functionality. Synchronization of feedbackinduced chaos in semiconductor lasers by optical injection atsushi murakami1 and junji ohtsubo2 1department of electronic engineering, the university of electrocommunications, 151 chofugaoka, chofushi, tokyo 1828585, japan 2faculty of engineering, shizuoka university, 351 johoku, hamamatsu 4328561, japan received 16 april 2001. Modelling the spectra of distributed feedback lasers. Quantum dot semiconductor laser with optoelectronic feedback. Semiconductor lasers with optical feedback springerlink. Handbook of distributed feedback laser diodes artech. Osa a distributed feedback silicon evanescent laser.
There exists five feedback regimes that determine how a semiconductor operates under external feedback. The effective reflectivity, losses in the optical system, losses due to the backcoupling into the waveguide and the averaged optical confinement factor are calculated. These optical feedback effects impact all semiconductor lasers. Special designs of sampled bragg gratings have been used to fabricate distributed feedback semiconductor laser arrays with very precise. This is specially important in situations where direct modulation dm of the. One of our interesting results is that the delay, as well as the feedback strength, plays a very important role in the suppression of bistability. Organic semiconductor lasers with twodimensional distributed feedback. This is one way to generate highfrequency chaos and has in comparison to optical feedback the advantage of being phase insensitive. Improved organic semiconductor lasers based on a mixedorder distributed feedback resonator design article in applied physics letters 90 march 2007 with 98 reads how we measure reads. We report an electrically pumped distributed feedback silicon evanescent laser. Synchronization of feedback induced chaos in semiconductor lasers by optical injection atsushi murakami1 and junji ohtsubo2 1department of electronic engineering, the university of electrocommunications, 151 chofugaoka, chofushi, tokyo 1828585, japan 2faculty of engineering, shizuoka university, 351 johoku, hamamatsu 4328561, japan. As an application of organic semiconductor distributed feedback. Amplitude noise reduction in semiconductor lasers with. Multimode synchronization and communication using unidirectionally coupled semiconductor lasers.
Modeling of distrubuted feedback semiconductor lasers by mengmu shih august 2010 chair. Control of bistability in a directly modulated semiconductor. Semiconductor laser dynamics under polarized rotated optical delay feedback and frequency detuning by juli an bueno this master thesis numerically studies the changes in the dynamics of a semiconductor laser with delayed feedback considering a system of two modes te and tm. Feedback insensitive integrated semiconductor laser. Modelling and characterization of laterallycoupled distributed feedback laser and semiconductor optical amplifier by julie efiok nkanta thesis submitted to the faculty of graduate and postdoctoral studies in partial fulfillment of the requirements for the doctor of philosophy degree in physics department of physics.
Yanping xu,1 mingjiang zhang,1,2 liang zhang,1 ping lu,3 stephen mihailov,3 and xiaoyi bao1, 1department of physics, university of ottawa, 25 templeton street, ottawa, ontario k1n 6n5, canada. It is often beneficial to operate laser diodes with optical feedback, as provided, for example, by an external mirror according to fig. Most modern semiconductor lasers adopt a structure, where the current is. Integrated path differential absorption ipda lidar systems at both the. The diagram of tkach and chraplyvy tc 2 has been the reference for describing and classifying feedback effects in semiconductor laser. The rp photonics buyers guide contains 34 suppliers for distributed feedback lasers. Box 248046, coral gables, florida 33124 received march 18, 1994. Analysis, fabrication, and characterization of tunable dfb lasers. The general function of lasers is based on optical feedback. There exists five feedback regimes that determine how. Circuit model for absorption grating gaincoupled distributed. Improved organic semiconductor lasers based on a mixedorder.
Handbook of distributed feedback laser diodes, second. This project will investigate entirely novel designs of the feedback mirror structures in longitudinal and verticalcavity semiconductor lasers. A distributed feedback laser dfb is a type of laser diode, quantum cascade laser or optical. Random bit generation at tunable rates using a chaotic. Simulation challenges for distributed feedback semiconductor lasers j. But when speaking of optical feedback one usually refers to external optical feedback. Electrical and computer engineering this work demonstrates the multiparameter modeling processes of calculating coupling coefficients of the optical waveguide structures for various distributed feedback dfb semiconductor lasers. Delayed optical feedback has been employed earlier 9. Since the optical feedback strongly influences the creation of light, this feedback engineering should be a powerful tool to precisely achieve the desired laser properties, e. Applications to optical chaos cryptography, radar frequency generation, and transverse mode control thesis presented by yanne chembo kouomou at the department of physics of the university of the balearic islands, for the obtention of the phd degree of physics.
Handbook of distributed feedback laser diodes, second edition artech house applied photonics kindle edition by morthier, geert, vankwikelberge, patrick. Distributed feedback semiconductor lasers iet digital library. Semiconductor laser dynamics under polarized rotated. Semiconductor diode with feedback file exchange matlab. External feedback sensitivity of partly gaincoupled dfb semiconductor lasers r. The result is a singlemode emission at an outmost precise wavelength with an extremely narrow linewidth. Pdf organic semiconductor distributed feedback dfb.
Pdf organic semiconductor distributed feedback dfb laser. External optical feedback effects in distributed feedback. A circuit model for absorption grating ag gaincoupled gc distributed feedback dfb semiconductor laser diodes ld is presented, based on the rate equations of carrier densities in active region and absorption grating, as well as the photon density. The results show that chaotic behavior persists for larger values of f that lie in the normal range of values for semiconductor lasers used for communication purposes. It is well known that semiconductor distributed feedback lasers. Periodic structures, like the dbr mirrors in vcsels, can be also realized in a waveguide, as shown. Use features like bookmarks, note taking and highlighting while reading handbook of distributed feedback laser diodes, second edition artech house applied photonics. Chaotic dynamics of semiconductor laser with current. Another possible method is to insert an optical feedback in the device to.
Dfb lasers we demonstrate their use as excitation sources in raman spectroscopy. These lasers, called quantum cascade lasers qcls operate. Timedelay signature suppression in a chaotic semiconductor. Synchronization of feedbackinduced chaos in semiconductor. This method allows for the realization of electrically driven lasers on silicon, a. Then, this model is used to study both positive and negative oef.
Semiconductor dfb lasers in the lowest loss window of optical fibers at about 1. Numerical analysis of external feedback concepts for spectral. Yariv department of applied physics, california institute of technology, 12895, pasadena, california 91125 y. The dfb laser is the main topic of this report and in particular the.
Injection locking in distributed feedback semiconductor lasers. Distributed feedback dfb semiconductor lasers emit light in a single mode which is essential to providing the carrier in long haul high bitrate optical communication systems. This type of diode laser is now called a distributed feedback dfb laser. Amplitude noise reduction in semiconductor lasers with weak, dispersive optical feedback j. Distributed feedback dfb laser diode jose boavida, member, ieee abstractthe aim of this work is the study of semiconductor lasers with distributed feedback dfb, namely their usage as the light source in high bit rate optical communication systems ocs. The laser operates continuous wave with a single mode output at 1600 nm. Buy handbook of distributed feedback laser diodes artech house applied photonics on free shipping on qualified orders. Since its publication it has become a milestone reference. Distributed feedback lasers are singlemode lasers containing an integrated grating structure. Cavitymode properties of semiconductor lasers operating in strongfeedback regime 210 power ratio less than. Semiconductor distributed feedback lasers with quantum. One of the simplest schemes of chaosbased photonic rbg adopts a mirror for providing feedback into a semiconductor laser. Simulation challenges for distributed feedback semiconductor. In a general sense, these lasers belong to the class of delay systems, extensively studied in many different areas.
The scheme is simple in requiring only one ordinary singlemode semiconductor laser with a conventional mirror 1. Improved organic semiconductor lasers based on a mixed. Typical geometrical sizes of the laser chip are m x 500m x 200m length x width x height. Distributed feedback semiconductor lasers by john carroll. A dfb laser emitting at a wavelength around 940nm in a single longitudinal mode up to an output power of 500mw with a side mode. Distributed feedback dfb diode lasers are fixed wavelength single mode diode lasers. Selfinjected semiconductor distributed feedback lasers. Photons emitted from the active region are backreflected by the mirrors into the gain medium. Nonlinear dynamics of semiconductor lasers with active. Eindhoven university of technology master design of grating. Makino abstractexternal optical feedback sensitivity of partly gain coupled dfb semiconductor lasers has been analyzed in above threshold operation regime. Optoelectronic feedback 2 can be used to reduce the distortion in a same way as electronic feedback. Synchronization and optimization of semiconductor ring lasers.
Selfinjected semiconductor distributed feedback lasers for frequency chirp stabilization khalil kechaou,1, frederic grillot,1,2 jeanguy provost,3 bruno thedrez,1 and didier erasme1 1institut minestelecom, telecom paristech, cnrs ltci, 46 rue barrault, 75634 paris cedex, france. Organic semiconductor distributed feedback dfb laser as excitation source in raman spectroscopy article pdf available in optics express 2123. The semiconductor distributed feedback dfb laser is mainly characterised by. This external mirror may serve, for example, for the. Resonant modulation of semiconductor lasers beyond 60 ghz using strong optical feedback fumio koyama1, moustafa f. Rp photonics encyclopedia distributed feedback lasers, dfb. We employed an efficient small molecule blend, a high quality resonator and a novel encapsulation method resulting in an improved laser output power, a reduced laser line width and an enhanced power stability. The maximum operating temperature and minimum line width of the laser are 50 c, and 3. The paper gives a brief summary about the applied simulation model and proceeds with the results for the different feedback concepts. Rp photonics encyclopedia distributed feedback lasers. We may define the fourier transform to the grid function fn as. Timedelay signature suppression in a chaotic semiconductor laser by fiber random grating induced distributed feedback. Resonant modulation of semiconductor lasers beyond 60.
As an application of organic semiconductor distributed feedback dfb lasers we demonstrate their use as excitation sources in raman spectroscopy. Nonlinear distortion reduction in directly modulated semiconductor laser using feedforward linearisation t ismail and a j seeds. Nonlinear dynamics of semiconductor laser systems with feedback. Index termschirped grating, continuous tuning, dfb laser, linear chirp, tunable laser. In this way, optical feedback is realized and finally controls the process of stimulated emission. Multiplewavelength distributedfeedback laser arrays with high. Download it once and read it on your kindle device, pc, phones or tablets. Adams nortel networks high performance optical component solutions 3500 carling avenue ottawa, on k2h 8e9 canada distributed feedback dfb semiconductor lasers are the workhorses of optical. Modeling of distributed feedback semiconductor lasers. Onedimensional simulation methods for distributed feedback. By offering a single mode oscillation and narrow spectral output, distributed feedback dfb semiconductor laser diodes offer excellent optical light sources as well as optical filters for fibre based communications and dense wavelength division multiplexing dwdm.
Synchronization and optimization of semiconductor ring. The laser threshold is 25 ma with a maximum output power of 5. In a directly modulated laser, the main source of distortion is caused by the intrinsic nonlinearities of the laser which limits the dynamic range and hence the system performance. Modelling and characterization of laterallycoupled. We have developed a ridgewaveguide distributed feedback laser in. Nonlinear distortion reduction in directly modulated. Osa organic semiconductor distributed feedback dfb laser.
Feedback insensitive integrated semiconductor laser the high purity of laser light is indispensable for applications ranging from telecommunications and metrology to health care. Organic semiconductor lasers with twodimensional distributed. This paper deals with the problem of synchronization and optimization of semiconductor ring lasers. Shevy department of physics, university of miami, p. In order to explore the technological potential of organic semiconductor lasers two alternative concepts for electrical operation were examined. An excitability is seen in the behavior of oef qd sl which shows a high sensitivity to changes in time delay compared with other sls. Semiconductor optoelectronics farhan rana, cornell university chapter distributed feedback dfb structures and semiconductor dfb lasers. Most distributedfeedback lasers are either fiber lasers or semiconductor lasers, operating on a single resonator mode singlefrequency operation. Cavitymode properties of semiconductor lasers operating in.
Semiconductor lasers with optical feedback are both of fundamental and practical importance. Organic semiconductor distributed feedback dfb laser as. Distributed feedback laser diodes and optical tunable filters. May 31, 2018 this project will investigate entirely novel designs of the feedback mirror structures in longitudinal and verticalcavity semiconductor lasers. Semiconductor lasers optical processes in semiconductors absorption, gain, and pumping types of semiconductor lasers university of neuchatel, switz. The laser chip is grown by movpe of compound semiconductor material.
Depurtment o electricul engineering, university o tennessee, f f knoxville, tennessee 379962100. Bakry2 1photonics integration system research center, precision and intelligence laboratory, tokyo institute of technology, yokohama 2268503, japan. Handbook of distributed feedback laser diodes artech house. Opticalfeedbackinduced chaos and its control in multimode semiconductor lasers. Nonlinear dynamics of semiconductor laser systems with. Semiconductor laser dynamics under polarized rotated optical. Fivehundredmilliwatts distributedfeedback diode laser emitting at. In this paper we investigate semiconductor lasers with optoelectronic feedback. Highpower distributed feedback semiconductor lasers operating at. Selfinjected semiconductor distributed feedback lasers for. Periodic structures, like the dbr mirrors in vcsels, can be also realized in a waveguide, as shown below in the case of a ingaaspinp waveguide. Advances in optical fibre based communications systems have played a crucial role in the development of the information highway.