Results 211 to 220 of about 3,159 (260)

Optical Feedback in Vertical-Cavity Surface-Emitting Lasers

IEEE Journal of Selected Topics in Quantum Electronics, 2013
Vertical-cavity surface-emitting lasers (VCSELs) are as sensitive to optical feedback (OF) as edge-emitting lasers as their much higher mirror reflectivity is compensated by the much smaller intracavity round-trip time resulting in a similar OF rate. VCSELs may emit light in multiple transverse modes and may exhibit polarization bistability which adds ...
Panajotov, Krassimir, Sciamanna, Marc, Arteaga, M.A., Thienpont, Hugo   +3 more
openaire   +4 more sources

Dynamic Characteristics Of Vertical Cavity Surface Emitting Lasers

LEOS '90. Conference Proceedings IEEE Lasers and Electro-Optics Society 1990 Annual Meeting, 1990
The dynamic behavior of low-threshold vertical-cavity surface-emitting lasers is investigated by using time-resolved spectra for the first time. Significant chirp is observed in the lasing spectrum owing to heating caused by the relatively high operating voltage and resistance.
C. J. Chang-Hasnain, C. E. Zah, G. Hasnain, J. P. Harbison, L. T. Florez, N. G. Stoffel, T. P. Lee   +6 more
openaire   +1 more source

The Vertical-Cavity Surface-Emitting Laser as a Sensing Device

Journal of Lightwave Technology, 2018
We show that a change to the quality ( Q ) factor of a laser diode cavity affects the electrical properties of the device. The mechanism is demonstrated experimentally and numerically via a 980-nm InGaAs/GaAs oxide-aperture vertical-cavity surface-emitting laser (VCSEL) wherewith thin, sub-half-lambda-thick Si x N y layers are deposited on top of the
Magdalena Marciniak, Lukasz Piskorski, Marcin Gebski, Maciej Dems, Michal Wasiak, Krassimir Panajotov, James A. Lott, Tomasz Czyszanowski   +7 more
openaire   +2 more sources

MEMs-Tunable vertical-cavity surface-emitting lasers

OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171), 2001
We present a MEM-VCSEL which can provide over 50 nm of wavelength tuning, up to 8 dBm optical power, and a high side mode suppression. The viability of these devices for telecom applications is directly demonstrated through transmission experiments.
D. Vakhshoori, P.D. Wang, M. Azimi, K.J. Knopp, M. Jiang   +4 more
openaire   +1 more source

Midinfrared vertical-cavity surface-emitting laser

Applied Physics Letters, 1997
We 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, W. W. Bewley, I. Vurgaftman, J. R. Meyer, L. Goldberg, D. H. Chow, E. Selvig   +6 more
openaire   +1 more source

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), 2003
Summary 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, D.D. Nolte, C. Lenox, B. Streetman   +3 more
openaire   +1 more source

Passive vertical cavity surface emitting lasers

IEEE Photonic Society 24th Annual Meeting, 2011
We 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, S. N. Brown, J. A. Lott, V. A. Shchukin, N. N. Ledentsov, K. D. Choquette   +5 more
openaire   +1 more source

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), 1998
Summary 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.
openaire   +2 more sources

A Vertical-Cavity Surface-Emitting Laser at Threshold

IEEE Photonics Technology Letters, 2006
Linewidth 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, Toffano, Zeno, Lindberg, Åsa Marie   +2 more
openaire   +2 more sources

Visible vertical-cavity surface-emitting laser

SPIE Proceedings, 1998
We have designed and fabricated the visible vertical-cavity surface-emitting lasers (VCSEL's) by using metalorganic vapor phase epitaxy (MOVPE). We use the 8 lambda optical cavities with 3 quantum wells in AlGaInP/AlGaAs red VCSEL's to reduce the drift leakage current and enhance the model gain in AlGaInP active region. The structure has a p-type stack
Peng Cheng, Xiaoyu Ma, Junhua Gao, Xuejun Kang, Qing Cao, Hongjie Wang, Liping Luo, Chunhui Zhang, Xiuling Lu, ShiMing Lin   +9 more
openaire   +1 more source