Results 211 to 220 of about 12,505 (251)
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Midinfrared vertical-cavity surface-emitting laser
Applied Physics Letters, 1997We report a type-II antimonide midinfrared vertical-cavity surface-emitting laser. The emission wavelength of 2.9 μm is nearly independent of temperature (dλ/dT≈0.07 nm/K) and the multimode linewidth is quite narrow (3.5 nm). The pulsed threshold power at 86 K is as low as 22 mW for a 30 μm spot.
C. L. Felix +6 more
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Holographic vertical-cavity surface-emitting laser
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013), 2003Summary form only given. We present holographic diffraction from a broad-area thin-film holographic laser. The holographic laser is similar to a vertical-cavity surface-emitting laser (VCSEL) and consists of a 1 /spl mu/m thick GaAs active layer sandwiched between two 61.6 nm Al/sub 0.1/Ga/sub 0.9/As-AlAs 72.8 nm Bragg stacks, centered at 870 nm, with ...
K.M. Kwolek +3 more
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Passive vertical cavity surface emitting lasers
IEEE Photonic Society 24th Annual Meeting, 2011We have recently demonstrated a vertical cavity surface emitting laser (VCSEL) formed by a passive half-wavelength cavity combined with a quantum dot active region contained within a quarter-wavelength thick layer of the upper distributed Bragg reflector (DBR) [1].
A. M. Kasten +5 more
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Fusion bonding for vertical cavity surface-emitting lasers
OFC '98. Optical Fiber Communication Conference and Exhibit. Technical Digest. Conference Edition. 1998 OSA Technical Digest Series Vol.2 (IEEE Cat. No.98CH36177), 1998Summary form only given. This talk summarizes current efforts in fusion bonding and the application of this technology to vertical- cavity surface-emitting lasers at Hewlett- Packard laboratories. We discuss electrical characteristics, carrier-concentration profiling and SIMS analyses through InP/GaAs junctions, and the development of 1300 nm VCSELs.
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A Vertical-Cavity Surface-Emitting Laser at Threshold
IEEE Photonics Technology Letters, 2006Linewidth is measured over the threshold transition of a vertical-cavity surface-emitting laser and results are compared to a Fokker–Planck semiconductor laser model. The linewidth shows non monotonous behaviour at threshold similar to that previously observed in distributed feedback lasers.
Fordell, Thomas +2 more
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Lineshape of a vertical cavity surface emitting laser
Optics Communications, 2002We report on the experimental study of the lineshape of an air-post GaAs/AlGaAs Vertical-Cavity Surface-Emitting Laser (VCSEL). The signal is obtained by heterodyne with a narrow linewidth extended-cavity laser. This technique allows to fully take into account the entire spectrum of frequency fluctuations.
S. VICIANI +5 more
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Visible vertical-cavity surface-emitting lasers
Optical Society of America Annual Meeting, 1992We report the operation of visible-light (670-630 nm) vertical-cavity surface-emitting lasers (VCSELs) in a photopumped structure. Visible VCSELs are a promising breakthrough for visible laser technology because of their surfacenormal operation, nonastigmatic output beams, ease of fabrication of closely spaced 1- and 2-dimensional arrays, and ease of ...
R. P. Bryan +3 more
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Vertical-cavity surface emitting lasers
Optics and Lasers in Engineering, 2000Julian Cheng, Niloy K. Dutta
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