Short-wavelength lasers

Article Abstract:

Scientists have attempted to shorten the wavelength of lasers since their introduction in 1960, but true X-ray laser wavelengths of 0.1 nm or less are not yet a reality. The molecular fluorine laser's 157 nm wavelength is one of the shortest commercially available. Soft X-ray or extreme-ultraviolet (XUV) lasers with 3 nm wavelengths have been demonstrated in laboratories. The recent development of short-wavelength lasers is reviewed and three pumping mechanisms are demonstrated that are capable of producing lasing at wavelengths from 3 to 100 nm. These mechanisms include electron-icon recombination, phot-excitation and electron-collisional excitation. Future directions in short-wavelength laser development are discussed.

Electrical equipment & supplies, not elsewhere classified, History, Technical, Trends, Outlook

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Recent advances in long-wavelength semiconductor lasers for optical fiber communication

Article Abstract:

A review of progress in long wavelength semiconductor lasers based on the InGaAsP/InP system is presented. The trends will continue as designers tap into the vast bandwidth capabilities of single-mode fibers in an effort to realize broad-band networks; new technology will be needed. Linear laser arrays, two-dimensional laser arrays and other types of semiconductor lasers will become more important to future systems. The key material system for such devices will undoubtedly be the multiple quantum well structures (MQW) material system. New advances in opto-electronic integrated circuits will be provided by heteroepitaxy with the capability to integrate silicon electronics and GaAs and/or InP photonics.

Semiconductor devices, Electronic components, Technological forecasting, Optoelectronic devices, Semiconductor Device, Analysis, Future of Computing, Gallium Arsenide Semiconductor, Optical Communication

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Wavelength Domain Optical Network Techniques

Article Abstract:

Optical fiber technology has progressed quickly in the last decade. The development of single-mode lasers and low-loss fiber have made deployment of high-capacity systems over ranges in excess of 100 km possible. The need to replace copper cables in local area networks is the main force behind multiterminal optical systems. The first systems are expected to be those that use the optical path only for transmission. Future systems will probably include an optical switching capability.

Fiber optics, Network architectures, Networks, Network Architecture

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