Coherence properties of an amplified spontaneous emission laser: experiments on a 10 Hz vacuum–ultraviolet H2-laser

Tommasini, R.; Insam, S.; Fill, Ernst E.

doi:10.1016/s0030-4018(00)00733-1

Cited by 12 publications

(3 citation statements)

References 21 publications

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“…Since the material system and device structure described here are typical for VCSELs, this behavior is expected to be common for various VCSEL structures. Nonetheless we note that such quasi-homogeneous emission is uncommon in lasers without additional active or passive intra-or extra cavity elements [1,24,26]. A related phenomenon has been described in capillary waveguide lasers [25], where in contrast to our lasers a small number of round trips is at the origin of the low spatial coherence.…”

Section: Originsupporting

confidence: 50%

Spatial decoherence of pulsed broad-area vertical-cavity surface-emitting lasers

Peeters¹,

Verschaffelt²,

Thienpont³

et al. 2005

Opt. Express

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We report a strong reduction of spatial coherence of the emission of large aperture vertical-cavity surface-emitting lasers when they are driven by microsecond electrical pulses. We give evidence that this is due to a breakdown of the modal emission of these lasers. The spatial decoherence manifests itself in the formation of a Gaussian far field intensity distribution. The coherence radius we extract is 1.4 micrometer under these operating conditions, irrespective of the Fresnel number of the vertical-cavity surface-emitting laser. Finally, the spatial coherence properties can be varied by changing the pulse duration or pulse amplitude.

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Section: Originsupporting

confidence: 50%

Spatial decoherence of pulsed broad-area vertical-cavity surface-emitting lasers

Peeters¹,

Verschaffelt²,

Thienpont³

et al. 2005

Opt. Express

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show abstract

“…Nonetheless we note that such quasi-homogeneous emission is uncommon in lasers without additional active or passive intra-or extra cavity elements. 2,23,25 …”

Section: Originmentioning

confidence: 99%

Nonmodal emission characteristics of broad-area vertical-cavity surface-emitting lasers

et al. 2006

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An overview of the idiosyncratic emission characteristics of pulsed broad-area VCSELs is presented, together with a statistical model which describes these devices as quasi-homogeneous sources. The predicted properties of such sources, which include two reciprocity relations between near and far field aspects of the cross-spectral density as well as its propagation, are verified experimentally. We finish by showing how and which thermal effects are at the origin of this nonmodal emission.

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“…Cavity is one essential component in a conventional laser system, where the light can pass back and forth through the gain medium and obtain significant amplification . On the other hand, Mirrorless lasing, where cavity is not required for generating the laser‐like emission, has attracted great interests for many years due to its quantum nature . In systems supporting mirrorless lasing, extremely high gain is needed so that the light gets enough amplification when it passes the gain medium without mirrors, pointing an interesting connection with physical phenomena in quantum optics including superradiance, superfluorescence, coherence brightening, and amplified spontaneous emission (ASE) .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Air Lasing: A Perspective from Quantum Coherence

et al. 2019

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The research topic of air lasing is of fundamental and practical importance, which has grown rapidly in the past decade. Air lasing, or a laser‐like emission from air species including atomic oxygen, atomic argon, atomic nitrogen, molecular nitrogen, and molecular nitrogen ions, has been investigated vastly in both experiment and theory. In this review, the basic concepts of air lasing are discussed and the crucial role of quantum coherence in the air‐lasing process is highlighted. As an exciting perspective, air lasing not only exhibits important fundamental physics such as superradiance, nonlinear effects, vibrational and rotational dynamics, but also shows potential practical implications toward remote sensing.

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Coherence properties of an amplified spontaneous emission laser: experiments on a 10 Hz vacuum–ultraviolet H2-laser

Cited by 12 publications

References 21 publications

Spatial decoherence of pulsed broad-area vertical-cavity surface-emitting lasers

Spatial decoherence of pulsed broad-area vertical-cavity surface-emitting lasers

Nonmodal emission characteristics of broad-area vertical-cavity surface-emitting lasers

Recent Advances in Air Lasing: A Perspective from Quantum Coherence

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