Results 41 to 50 of about 23,614 (296)

Quantum Noise and Polarization Fluctuations in Vertical Cavity Surface Emitting Lasers [PDF]

, 1997
We investigate the polarization fluctuations caused by quantum noise in quantum well vertical cavity surface emitting lasers (VCSELs). Langevin equations are derived on the basis of a generalized rate equation model in which the influence of competing ...
A. K. J. van Doorn, A. Vinattieri, C. J. Chang-Hasnain, D. F. Walls, D. Vakhshoori, F. Koyama, H. Hirayama, Holger F. Hofmann, J. Martin-Regalado, K. D. Choquette, K. D. Choquette, M. S. Miguel, M. Travagnin, Ortwin Hess, R. Ferreira, T. Baba, T. Uenoyama, Y. Yamamoto   +17 more
core   +2 more sources

Gain characteristics of In_0.60Ga_0.40As/In_0.53Al_0.20Ga_0.27As superlattice active regions for vertical-cavity surface-emitting lasers

Научно-технический вестник информационных технологий, механики и оптики
The results of investigation of the gain properties of 1300 nm vertical-cavity surface-emitting lasers active regions based on In0.60Ga0.40As/In0.53Al0.20Ga0.27As superlattices and threshold characteristics comparison of superlattices and highly lattice ...
P. E. Kopytov, V. V. Andryushkin, E. V. Pirogov, M. S. Sobolev, A. V. Babichev, Yu. M. Shernyakov, M. V. Maximov, A. V. Lyutetskiy, N. A. Pikhtin, L. Ya. Karachinsky, I. I. Novikov, Tian Sicong, A. Yu. Egorov   +12 more
doaj   +1 more source

High-Brightness, High-Speed, and Low-Noise VCSEL Arrays for Optical Wireless Communication

IEEE Access, 2022
The development of high-speed and high-brightness vertical-cavity surface-emitting lasers (VCSELs), which can serve as an efficient light source for optical wireless communication (OWC), play a crucial role in growth of the next generation of wireless ...
Zuhaib Khan, Yung-Hao Chang, Te-Lieh Pan, Yaung-Cheng Zhao, Yen-Yu Huang, Chia-Hung Lee, Jui-Sheng Chang, Cheng-Yi Liu, Cheng-Yuan Lee, Chao-Yi Fang, Jin-Wei Shi   +10 more
doaj   +1 more source

Microchip vertical external cavity surface-emitting lasers

The 16th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2003. LEOS 2003., 2003
In this paper we have demonstrated monolithic "microchip" vertical external-cavity surface-emitting lasers (VECSEL), in which a cavity is formed between the VECSEL semiconductor back mirror and a dielectric mirror coating on the outer surface of the heat spreader, and where pump-induced thermal lensing may provide cavity stability. We have demonstrated
Hastie, J.E., Hopkins, J.M., Jeon, C.W., Calvez, S., Burns, D., Dawson, M.D., Abram, R.H., Riis, E., Ferguson, A.I., Alford, W.J., Raymond, T.D., Allerman, A.A.   +11 more
openaire   +3 more sources

High-Efficiency Quantum Dot Lasers as Comb Sources for DWDM Applications

Applied Sciences, 2022
The trend of data center transceivers is to increase bandwidth while simultaneously decreasing their size, power consumption, and cost. While data center links have previously relied on vertical-cavity surface-emitting lasers (VCSELs) or in-plane lasers ...
Mario Dumont, Songtao Liu, M. J. Kennedy, John Bowers   +3 more
doaj   +1 more source

Ultrafast circular polarization oscillations in spin-polarized vertical-cavity surface-emitting laser devices [PDF]

, 2010
Spin-polarized lasers offer new encouraging possibilities for future devices. We investigate the polarization dynamics of electrically pumped vertical-cavity surface-emitting lasers after additional spin injection at room temperature.
Ackemann, T., Gerhardt, N. C., Hofmann, M. R., Jaehme, H., Li, M., Soldat, H.   +5 more
core   +1 more source

Formation of Low Threshold Voltage Microlasers [PDF]

, 1992
Vertical cavity surface emitting lasers (VCSELs) with threshold voltages of 1.7V have been fabricated. The resistance-area product in these new vertical cavity lasers is comparable to that of edge-emitting lasers, and threshold currents as low as 3 mA ...
Florez, L. T., Harbison, J. P., Jewell, J. L., Scherer, A., Walther, M.   +4 more
core  

External-fiber-grating vertical-cavity surface-emitting lasers [PDF]

, 2000
A Bragg grating in graded-index multimode fiber was coupled to a 0.8-/spl mu/m VCSEL. By using a fiber Bragg grating, the spectral width of the VCSEL decreased to 1/2-1/3 of the initial value, depending on the temperature of the fiber Bragg grating.
Hamada T, Mizunami Toru, Yamamoto T
core   +2 more sources

PBF‐LB/M of Ti‐6Al‐4V: High‐Pressure Solution Treatment and Aging for Applications in a Sustainable Aerospace

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) allows great geometric freedom for lightweight components. As parts are progressively optimized exploiting potentials in AM leading in smaller material cross sections, high pressure solution treating and aging (STA) treatments show an enormous potential for strongly improving material properties.
Mika León Altmann, Andre Danzig, Freerk Syassen, Rainer Fechte‐Heinen, Anastasiya Toenjes   +4 more
wiley   +1 more source

Active anti-guide vertical cavity surface emitting lasers with diffused quantam wells structure [PDF]

, 1998
The enhancement of single transverse mode operation in vertical cavity surface emitting lasers by using interdiffused quantum wells is proposed and analyzed.
Li, EH, Man, WM, Yu, SF
core