Optically achieved p-i-n diode switch utilizing a two-dimensional laser array at 808 nm as an optical source

Rosen, A.; Stabile, Paul J.; Bechtle, D.; Janton, W.; Gombar, A.; McShea, J.C.; Rosenberg, A.; Herczfeld, P.R.; Bahasadri, A.

doi:10.1109/16.19938

Cited by 14 publications

(1 citation statement)

References 5 publications

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“…In the early 1980s, Rosen hooked up with Drexel University professor Peter Herczfeld, in what would become a long lasting personal and research relationship. The two began collaborating on optically activated PIN diode switching [23]- [26], but Herczfeld's interests in medical applications drew Rosen into Drexel more formally, and in the late 1980's Arye matriculated as a PhD candidate in Herczfeld's group. This time, with two more significant medical patents under his belt, and again assigned to RCA Labs, management agreed to the arrangement.…”

Section: Introductionmentioning

confidence: 99%

Microwave Pioneers: Arye Rosen, “Microwaves in Medicine Was Just my Hobby”

Siegel

2021

IEEE J. Microw.

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This is the fourth article in our continuing series of biographical pieces with a technical lean. The subject of this paper is Professor Arye Rosen, who -while employed full time at RCA Sarnoff Research Laboratory as an engineer and working on the side more-or-less as a "hobby" -pioneered the use of microwave angioplasty and ablation techniques in cardiology, and later influenced the use of microwaves in the treatment of benign prostatic hyperplasia (BPH). Dr. Rosen's life story is as varied and interesting as his career path, and his contributions both to traditional microwave devices as well as microwaves in medicine will definitely inspire those of you who feel like they are pulled in more than one direction professionally. In Dr. Rosen's case, he did "have it all," but he worked very hard to make it happen and he took lots of chances …as you will hear! INDEX TERMS Microwave pioneers, Arye Rosen, microwaves in medicine, balloon catheter hyperthermia.1 This article was compiled after two wonderfully entertaining interviews with Dr. Arye Rosen -he used an iPhone no less, on March 3 rd and 5 th , 2021. Normally, the interviews would have been face-to-face, but Covid 19 restrictions forced their conversion into Zoom video conference sessions. Dr. Rosen was in his residence of many years in Cherry Hill, NJ where he could somewhat reasonably commute between Princeton, NJ (

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Section: Introductionmentioning

confidence: 99%

Microwave Pioneers: Arye Rosen, “Microwaves in Medicine Was Just my Hobby”

Siegel

2021

IEEE J. Microw.

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Two-dimensional array of high-power strained quantum well lasers with λ=0.95 μm

Bour

Stabile

Rosen

et al. 1989

Applied Physics Letters

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An incoherent, two-dimensional array of high-power lasers operating at λ=0.95 μm is demonstrated. The laser structure consists of a single 70 Å strained In0.2Ga0.8As quantum well active region with an AlGaAs graded-index separate confinement heterostructure, prepared by atmospheric pressure organometallic vapor phase epitaxy. The rack-and-stack array contains 536 oxide-stripe emitter elements in a 1.7 mm×1 cm area, producing approximately 200 Watts at a 60 A drive current. Under pulsed operation the external differential quantum efficiency is 40% while the power conversion efficiency reaches 16%. At high power, greater than 90% of the individual elements are lasing, with an overall spectral width Δλ∼5 mm.

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Optimum cavity length for high conversion efficiency quantum well diode lasers

Bour

Rosen

1989

Journal of Applied Physics

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The cavity length which maximizes the peak power conversion efficiency is determined for quantum well diode lasers. These calculations are based upon simple models of the diode injection laser’s electrical and optical behaviors, including saturation in the quantum well gain-current characteristic. Here the influences of the distributed optical cavity loss, electrical resistivity, and facet reflectivity on the optimum cavity length are described. Although a lower facet reflectivity results in increased threshold current, there are advantages to longer devices, as the peak conversion efficiency is not reduced. Since the optimum cavity length is greater for low reflectivity, the diode series resistance is smaller. Furthermore, when operating at the point where conversion efficiency is a maximum, the power output of the device with low facet reflectivity exceeds that of the device with higher facet reflectivity. Therein lies the principle advantage of reduced front-facet reflectivities in high power, high efficiency quantum well diode lasers. Good agreement results when these predictions are applied to a strained InGaAs/AlGaAs single quantum well laser (λ=0.93 μm).

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Optically achieved p-i-n diode switch utilizing a two-dimensional laser array at 808 nm as an optical source

Cited by 14 publications

References 5 publications

Microwave Pioneers: Arye Rosen, “Microwaves in Medicine Was Just my Hobby”

Microwave Pioneers: Arye Rosen, “Microwaves in Medicine Was Just my Hobby”

Two-dimensional array of high-power strained quantum well lasers with λ=0.95 μm

Optimum cavity length for high conversion efficiency quantum well diode lasers

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