scholarly journals 8 W continuous wave front‐facet power from broad‐waveguide Al‐free 980 nm diode lasers

1996 ◽  
Vol 69 (11) ◽  
pp. 1532-1534 ◽  
Author(s):  
L. J. Mawst ◽  
A. Bhattacharya ◽  
J. Lopez ◽  
D. Botez ◽  
D. Z. Garbuzov ◽  
...  
Keyword(s):  
Wave Front ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Front Facet

6.1 W continuous wave front-facet power from Al-free active-region (λ=805 nm) diode lasers

1998 ◽  
Vol 72 (1) ◽  
pp. 4-6 ◽  
Author(s):  
J. K. Wade ◽  
L. J. Mawst ◽  
D. Botez ◽  
R. F. Nabiev ◽  
M. Jansen ◽  
...  
Keyword(s):  
Active Region ◽  
Wave Front ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Front Facet

scholarly journals Erratum: ‘‘8 W continuous wave front‐facet power from broad‐waveguide Al‐free 980 nm diode lasers’’ [Appl. Phys. Lett. 69, 1532 (1996)]

1996 ◽  
Vol 69 (22) ◽  
pp. 3437-3437
Author(s):  
L. J. Mawst ◽  
A. Bhattacharya ◽  
J. Lopez ◽  
D. Botez ◽  
D. Z. Garbuzov ◽  
...  
Keyword(s):  
Wave Front ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Front Facet

scholarly journals 14.3 W quasicontinuous wave front-facet power from broad-waveguide Al-free 970 nm diode lasers

1997 ◽  
Vol 71 (9) ◽  
pp. 1142-1144 ◽  
Author(s):  
A. Al-Muhanna ◽  
L. J. Mawst ◽  
D. Botez ◽  
D. Z. Garbuzov ◽  
R. U. Martinelli ◽  
...  
Keyword(s):  
Wave Front ◽  
Diode Lasers ◽  
Front Facet

High power continuous and quasi-continuous wave InGaAsP/InP broad-waveguide separate confinement-heterostructure multiquantum well diode lasers

1997 ◽  
Vol 33 (19) ◽  
pp. 1635 ◽  
Author(s):  
D.Z. Garbuzov ◽  
R.J. Menna ◽  
R.U. Martinelli ◽  
J.H. Abeles ◽  
J.C. Connolly
Keyword(s):  
High Power ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Multiquantum Well

scholarly journals Medical Applications of Diode Lasers: Pulsed versus Continuous Wave (cw) Regime

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 710
Author(s):  
Michał Michalik ◽  
Jacek Szymańczyk ◽  
Michał Stajnke ◽  
Tomasz Ochrymiuk ◽  
Adam Cenian
Keyword(s):  
Diode Laser ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Short Review ◽  
Medical Application ◽  
Medical Applications ◽  
Therapeutic Effects ◽  
Pulsed Mode ◽  
Medical Therapies

The paper deals with the medical application of diode-lasers. A short review of medical therapies is presented, taking into account the wavelength applied, continuous wave (cw) or pulsed regimes, and their therapeutic effects. Special attention was paid to the laryngological application of a pulsed diode laser with wavelength 810 nm, and dermatologic applications of a 975 nm laser working at cw and pulsed mode. The efficacy of the laser procedures and a comparison of the pulsed and cw regimes is presented and discussed.

scholarly journals Spectral Linewidth vs. Front Facet Reflectivity of 780 nm DFB Diode Lasers at High Optical Output Power

2018 ◽  
Vol 8 (7) ◽  
pp. 1104 ◽  
Author(s):  
Thanh-Phuong Nguyen ◽  
Hans Wenzel ◽  
Olaf Brox ◽  
Frank Bugge ◽  
Peter Ressel ◽  
...  
Keyword(s):  
Output Power ◽  
Diode Lasers ◽  
Substantial Reduction ◽  
Distributed Feedback ◽  
Optical Output ◽  
Spectral Linewidth ◽  
Facet Reflectivity ◽  
Simulation Results ◽  
Front Facet

The influence of the front facet reflectivity on the spectral linewidth of high power DFB (distributed feedback) diode lasers emitting at 780 nm has been investigated theoretically and experimentally. Characterization of lasers at various front facet reflections showed substantial reduction of the linewidth. This behavior is in reasonable agreement with simulation results. A minimum linewidth of 8 kHz was achieved at an output power of 85 mW with the laser featuring a front facet reflectivity of 30%. The device with a front facet reflectivity of 5% reached the same linewidth value at an output power of 290 mW.

scholarly journals The fluctuation in the ionisation due to γ-Rays

1913 ◽  
Vol 89 (607) ◽  
pp. 45-57 ◽  
Keyword(s):  
Wave Front ◽  
Present Author ◽  
Previous Investigation ◽  
Quantitative Measurement ◽  
Continuous Wave ◽  
Bundle Theory ◽  
Discontinuous Wave ◽  
Straight Line ◽  
Γ Rays

The work to be here considered is a continuation of a previous investigation by Prof. Laby and the present author, in which the existence of fluctuations in the ionisation due to γ-rays from radium was demonstrated. In the present paper the quantitative measurement of this fluctuation is described, and its relation to the theory of γ-rays investigated. At the present time two theories exist for the explanation of the Röntgen and γ-rays (the two radiations exhibit so many properties in common that they are regarded as phenomena differing only in degree), viz., the pulse and entity theories. According to the former, the rays are conceived as propagated from the source, with a continuous wave front, while the latter theory includes the corpuscular form of Bragg, the pulse in a tube of force, or bundle, theory of Sir J. J. Thomson, and the quantum form postulated by Planck and Stark. In any of these last theories the disturbance has a discontinuous wave front and is propagated from the source along a straight line.

Coherent 1 W continuous wave operation of large‐aperture resonant arrays of antiguided diode lasers

1993 ◽  
Vol 62 (23) ◽  
pp. 2914-2916 ◽  
Author(s):  
C. Zmudzinski ◽  
D. Botez ◽  
L. J. Mawst ◽  
C. Tu ◽  
L. Frantz
Keyword(s):  
Continuous Wave ◽  
Diode Lasers ◽  
Large Aperture ◽  
Continuous Wave Operation

Investigation of the effect of low power laser used in photodynamic therapy for treatment of psoriasis

2012 ◽  
Vol 1 (4) ◽  
Author(s):  
Nafie A. Almuslet ◽  
Abdelmoniem E. Osman
Keyword(s):  
Photodynamic Therapy ◽  
Low Power ◽  
Plaque Psoriasis ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Electromagnetic Spectrum ◽  
Power Laser ◽  
Chronic Plaque Psoriasis ◽  
Low Level ◽  
Level Laser

AbstractThe objective of this study was to investigate the effect of power on low-level lasers used in photodynamic therapy (PDT) to treat chronic plaque psoriasis in a group of Sudanese patients.Twenty-four patients with chronic plaque psoriasis were randomly selected to enter this study from a total of 100 patients who attended the Khartoum Dermatology Teaching Hospital between 2010 and 2011. The lasers used for PDT were three continuous wave diode lasers in the red portion of the electromagnetic spectrum (671–675 nm) with output powers of 16, 50 and 100 mW to activate the chemical photosensitizer (LevulanThis study showed that 62% of the patients treated with 100 mW achieved complete clearance compared with 25% for those treated with 50 mW and 0% for those treated with 16 mW.The results showed that increasing the power of low-level laser in PDT increased the clearance of plaque psoriasis. PDT can be used as an alternative method for treatment of psoriasis.

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