Distributed Feedback Laser Diodes And Optical Tunable Filters Pdf
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- Distributed Feedback Laser Diodes and Optical Tunable Filters
- Applied Optics
- Wavelength Tunable Laser Diodes and Their Applications
A laser diode , LD , injection laser diode ILD , or diode laser is a semiconductor device similar to a light-emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode's junction. Driven by voltage, the doped p-n-transition allows for recombination of an electron with a hole. Due to the drop of the electron from a higher energy level to a lower one, radiation, in the form of an emitted photon is generated. This is spontaneous emission.
Distributed Feedback Laser Diodes and Optical Tunable Filters
You need Adobe Reader 7. If Adobe Reader is not installed on your computer, click the button below and go to the download site. In this article, we describe experimental results and an accurate wavelength control method for tunable distributed amplification distributed feedback TDA-DFB lasers, which can offer fast wavelength switching and high controllability because wavelengths can be changed continuously. They should provide light sources for future photonic networks such as wavelength routing systems. The capacity of optical fiber communication networks has increased greatly through the use of wavelength division multiplexing WDM systems, where signals with multiple wavelengths are transported in a single fiber. Since signals with different wavelengths do not interfere with each other, they can be separated easily by using an arrayed waveguide grating or other interferometer device. A wavelength routing system has been studied for future photonics network systems, where transmission paths are selected dynamically by using the wavelength of the signal lightwave as destination information.
Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Tunable optical-wavelength conversion using an optically-triggerable multielectrode distributed feedback laser diode Abstract: Tunable optical-wavelength conversion with tunability greater than 5 AA using a multielectrode distributed-feedback laser diode DFB LD with a saturable absorber is discussed. This device is not dependent on input polarization and can operate at up to MHz.
Single mode laser diodes with an electronically tunable wavelength are among the key components needed for advanced applications in optical communications, measurement and sensing. In particular, these devices may be used as wavelength controllable transmitters in wavelength division multiplexing or as local oscillators in optical receivers using the coherent detection technique. Furthermore, distance measurements with a high accuracy and large repetition frequency as well as three-dimensional viewing are feasible using the frequency modulated continuous wave radar technique in the optical domain. Also numerous measurement techniques in optoelectronics and fiber optics can be performed by means of wavelength tunable lasers. This paper reviews the recent progress made on electronically wavelength tunable laser diodes in the InGaAsP material system at 1. The operation principles and technological approaches of the various device concepts are presented and the laser parameters relevant for anticipated applications, such as tuning range, spectral linewidth and wavelength access, are discussed.
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Wavelength Tunable Optical Filters Based on DFB Laser Structures (Pages: ) · Summary · PDF · Request permissions.
Wavelength Tunable Laser Diodes and Their Applications
Glossary of Abbreviations. Glossary of Symbols. An Introduction to Optical Communication Systems. Conclusion, Summary and Suggestions.
Jetzt bewerten Jetzt bewerten. Advances in optical fibre based communications systems have playeda crucial role in the development of the information highway. Byoffering a single mode oscillation and narrow spectral output,distributed feedback DFB semiconductor laser diodes offerexcellent optical light sources as well as optical filters forfibre based communications and dense wavelength divisionmultiplexing DWDM systems. This comprehensive text focuses on thebasic working principles of DFB laser diodes and optical filtersand details the development of a new technique for enhanced systemperformance. DE
Show all documents Tunable lasers are needed to reduce the inventory costs associated with different part numbers for fixed wavelength distributed feedback lasers but also to provide new applica- tions such as optical switching and routing which require fast wavelength switching lasers in the nanosecond regime , . They are also being used for niche but increasingly important applications such as trace gas detection for environmental emis- sion monitoring and process control . The tuning range of conventional single frequency lasers is approximately 2—5 nm which significantly under-utilizes the available gain bandwidth of multiple quantum well semiconductor lasers more than nm and erbium doped fiber amplifiers about 40 nm in the - or -band. Consequently, research efforts have targeted the development of integrated lasers with extended tuning ranges beyond the refractive index limit, an overview can be found in .