STIMULATED EMISSION OF RADIATION FROM GaAs <i>p-n</i> JUNCTIONS

Nathan, M. I.; Dumke, W. P.; Burns, Gerald; Dill, F.H.; Lasher, Gordon

doi:10.1142/9789814503464_0120

Cited by 33 publications

(42 citation statements)

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“…Since the invention of the semiconductor laser in 1962 [1][2][3][4], its performance has improved steadily, primarily in terms of lifetime and power level. The output power, however, is limited due to catastrophic optical damage of the laser output facet.…”

Section: Introductionmentioning

confidence: 99%

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

Samsøe¹,

Andersen²,

Andersson‐Engels³

et al. 2004

Opt. Express

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Abstract:We demonstrate a novel technique for narrow bandwidth and highly improved lateral mode operation of a high-power broad area laser diode. The system uses simultaneous feedback from the first diffracted order and the zeroth reflected order of a diffraction grating. The two feedback paths lead to simultaneously improvement of the spectral and spatial properties of the laser diode. The laser system operates in the well-known asymmetric double-lobed far field pattern with the larger lobe being extracted as the output. The bandwidth of the output beam is measured to 0.07 nm, which corresponds to an improvement of a factor of 17 compared to the bandwidth of the freely running laser. The output from the system contains 54 % of the energy reaching the grating, or 75% of the power reflected into the zeroth order. The improvements in both the spatial and temporal coherence opens the possibility of using this laser system in applications such as frequency doubling and pumping of optical parametric oscillators.

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Section: Introductionmentioning

confidence: 99%

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

Samsøe¹,

Andersen²,

Andersson‐Engels³

et al. 2004

Opt. Express

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“…Following these original inventions, a wide variety of lasers were invented: the He-Ne laser, the CO 2 laser, the dye laser, and, most importantly from a communications point of view, the semiconductor laser. The last was simultaneously invented at three different industrial labs: IBM, 3 General Electric, 4,5 and MIT Lincoln Laboratory. 6 In order for the semiconductor laser to become commercially important, it was essential that the operating temperature be increased and the operating currents significantly decreased from these early reports.…”

Section: Introductionmentioning

confidence: 99%

The lasers behind the communications revolution

Brinkman¹,

Koch

Lang

et al. 2002

Bell Labs Tech. J.

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“…This so-called 'discovery of the century', followed by the first use of semiconductor lasers [3][4][5] in communications, heralded the start of optical communications. The laser provided a powerful coherent light source together with the possibility of modulation at high frequency, and this opened up a new portion of the electromagnetic spectrum with frequencies many times higher than those commonly available in radio communication systems.…”

mentioning

confidence: 99%

Introduction to Optical Communications

Ghafouri‐Shiraz

Karbassian

2012

Optical CDMA Networks

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The invention of the solid state ruby laser (acronym for light amplification by stimulated emission of radiation) in May 1960 [1] and the He-Ne gas laser [2] in December 1960 has led to some wide-ranging and very significant scientific and technological progress. This so-called 'discovery of the century', followed by the first use of semiconductor lasers [3][4][5] in communications, heralded the start of optical communications. The laser provided a powerful coherent light source together with the possibility of modulation at high frequency, and this opened up a new portion of the electromagnetic spectrum with frequencies many times higher than those commonly available in radio communication systems. In addition the narrow beam divergence of the laser made enhanced free-space optical transmission a practical possibility.Since optical frequencies are of the order of 100 THz, and information capacity increases directly with frequency bandwidth, the laser potentially offers a few order of magnitude increase in available bandwidth compared with microwave systems. Thus, by using only a small portion of the available frequency spectrum, a single laser could, in principle, carry millions of telephone conversations or TV channels.With the potential of such wideband transmission capabilities in mind, a number of experiments [6] using atmospheric optical channels were carried out in the early 1960s. These experiments showed the feasibility of modulating a coherent optical carrier wave at very high frequencies. However, the high cost of development for all the necessary components, and the limitations imposed on the atmospheric channel by rain, fog, snow and dust make such high-speed systems economically unattractive. However, numerous developments of free-space optical channel systems operating at baseband frequencies were in progress for earth-to-space communications [7,8].It soon became apparent that some form of optical waveguide was required. By 1963, bundles of several hundred glass fibres were already being used for small-scale Optical CDMA Networks: Principles, Analysis and Applications, First Edition. Hooshang Ghafouri-Shiraz and M. Massoud Karbassian.

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STIMULATED EMISSION OF RADIATION FROM GaAs p-n JUNCTIONS

Cited by 33 publications

References 0 publications

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

Improvement of spatial and temporal coherence of a broad area laser diode using an external-cavity design with double grating feedback

The lasers behind the communications revolution

Introduction to Optical Communications

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