scholarly journals Вертикально-излучающие лазеры спектрального диапазона 1.55 mum, сформированные методом спекания

2018 ◽  
Vol 44 (1) ◽  
pp. 59
Author(s):  
А.В. Бабичев ◽  
Л.Я. Карачинский ◽  
И.И. Новиков ◽  
А.Г. Гладышев ◽  
С.А. Блохин ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Modulation Frequency ◽  
Cutoff Frequency ◽  
Optical Power ◽  
Single Mode ◽  
Threshold Current ◽  
Bragg Reflector ◽  
Cavity Surface ◽  
Distributed Bragg Reflector ◽  
Aperture Diameter

AbstractThe results of studies on fabrication of vertical-cavity surface-emitting 1.55-μm lasers by fusing AlGaAs/GaAs distributed-Bragg-reflector wafers and an active region based on thin In_0.74Ga_0.26 As quantum wells grown by molecular-beam epitaxy are presented. Lasers with a current aperture diameter of 8 μm exhibit continuous lasing with a threshold current below 1.5 mA, an output optical power of 6 mW, and an efficiency of approximately 22%. Single-mode lasing with a side-mode suppression ratio of 40–45 dB is observed in the entire operating current range. The effective modulation frequency of these lasers is as high as 9 GHz and is limited by the low parasitic cutoff frequency and self-heating.

scholarly journals Дизайн и новая функциональность антиволноводных вертикально-излучающих лазеров на длину волны 850 nm

2018 ◽  
Vol 44 (1) ◽  
pp. 85
Author(s):  
Н.Н. Леденцов ◽  
В.А. Щукин ◽  
V.P. Kalosha ◽  
N.N. Ledentsov, Jr. ◽  
J.R. Kropp ◽  
...  
Keyword(s):  
Optical Power ◽  
Temperature Shift ◽  
Single Mode ◽  
Bragg Reflector ◽  
Laser Generation ◽  
Cavity Surface ◽  
Distributed Bragg Reflector ◽  
Aperture Diameter ◽  
Single Mode Laser ◽  
Emitting Lasers

AbstractVertical-cavity surface-emitting lasers (VCSELs) with an aperture limited by an oxide and a resonance cavity based on GaAlAs with high Al content provide a maximum γ factor (λ/2 design) and suppression of optical power beyond the aperture. A VCSEL with two coupled cavities provides additional sharp growth of the loss of high-order lateral modes by leakage to the oxidized region and provides single-mode laser generation for an aperture diameter of up to 5 μm. Single-mode antiwaveguiding VCSELs provide ultrafast data transmission with a rate of up to 160 Gbit/s. The structure in which the active medium is placed in the lower distributed Bragg reflector and the cavity and the upper distributed Bragg reflector are dielectric, reducing the temperature shift of the radiation wavelength by a factor of 2 (to ∼0.03 nm/K).

Optical Power Optimization of the Single Mode Vertical Cavity Surface Emitting Lasers by Two Oxide Layers

2011 ◽  
Vol 383-390 ◽  
pp. 6283-6288 ◽  
Author(s):  
Mohamad Yazdanypoor ◽  
Asghar Gholami
Keyword(s):  
Output Power ◽  
Optical Power ◽  
Single Mode ◽  
Threshold Current ◽  
Cavity Surface ◽  
Oxide Layers ◽  
High Frequency Response ◽  
Vertical Cavity Surface ◽  
Emitting Lasers ◽  
Vertical Cavity

Influence of using two oxide layers in the both sides of active layer with different position and aperture size on Vertical Cavity Surface Emitting Laser (VCSEL) performance is analyzed showing effects on the output power, single mode operation and threshold current. In addition, for improving speed we use ion implant area along with thick oxide layer to minimize parasitic elements. As the result, the proposed design exhibits much better stability of the fundamental mode over a wider current range, much higher output power, lower threshold current, than the conventional one with a high frequency response.

Distributed Bragg reflector ring oscillators: A large aperture source of high single-mode optical power

1993 ◽  
Vol 29 (6) ◽  
pp. 1895-1905 ◽  
Author(s):  
K.M. Dzurko ◽  
A. Hardy ◽  
D.R. Scifres ◽  
D.F. Welch ◽  
R.G. Waarts ◽  
...  
Keyword(s):  
Optical Power ◽  
Single Mode ◽  
Bragg Reflector ◽  
Ring Oscillators ◽  
Distributed Bragg Reflector ◽  
Large Aperture

scholarly journals Эффект насыщающегося поглотителя в длинноволновых вертикально-излучающих лазерах, реализованных по технологии спекания

2020 ◽  
Vol 46 (24) ◽  
pp. 49
Author(s):  
С.А. Блохин ◽  
М.А. Бобров ◽  
А.А. Блохин ◽  
А.П. Васильев ◽  
А.Г. Кузьменков ◽  
...  
Keyword(s):  
Optical Power ◽  
Single Mode ◽  
Threshold Current ◽  
Lasing Threshold ◽  
Cavity Surface ◽  
Lateral Direction ◽  
Vertical Cavity Surface ◽  
Current Confinement ◽  
Emitting Lasers ◽  
Height Step

Vertical-cavity surface-emitting lasers emitting at the spectral range of 1.55 µm based on heterostructures with a buried tunnel junction (BTJ) with a height step of 15 nm are studied. The devices are realized using wafer fusion technique of heterostructures grown by molecular beam epitaxy and demonstrate a single-mode lasing regime at the 8 μm BTJ-diameter. With a decrease in the BTJ-diameter, a sharp increase in the threshold current, accompanied by an abrupt increase in the output optical power and resonance frequency at the lasing threshold are observed. Stable single-mode lasing is due to the smoothing of the boundary of the overgrown surface relief, which leads to a smooth change in the profile of the effective refractive index in the lateral direction, while maintaining effective current confinement, which makes it possible to significantly reduce the transverse optical confinement factor for high-order modes even at large BTJ-diameter. However, at small BTJ-diameter, it also leads to the formation of a saturable absorber in the non-pumped parts of the active region.

Low-voltage-tunable distributed Bragg reflector using InGaAs/GaAs quantum wells

1993 ◽  
Vol 5 (6) ◽  
pp. 695-697 ◽  
Author(s):  
O. Blum ◽  
J.E. Zucker ◽  
X. Wu ◽  
K.H. Gulden ◽  
H. Sohn ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Low Voltage ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector

Compact Single-Mode Distributed Bragg Reflector Fiber Laser

2000 ◽  
Vol 17 (2) ◽  
pp. 109-111 ◽  
Author(s):  
Yi-Yuan Xue ◽  
Hong-Lin An ◽  
Li-Bin Fu ◽  
Xiang-Zhi Lin ◽  
Hong-Du Liu
Keyword(s):  
Fiber Laser ◽  
Single Mode ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector

Lithographic in-mold patterning for CsPbBr3 nanocrystals distributed Bragg reflector single-mode laser

Nanoscale ◽  
2021 ◽  
Vol 13 (37) ◽  
pp. 15830-15836
Author(s):  
Ahmad Syazwan Ahmad Kamal ◽  
Cheng-Chieh Lin ◽  
Di Xing ◽  
Yang-Chun Lee ◽  
Zhiyu Wang ◽  
...  
Keyword(s):  
Single Mode ◽  
Bragg Reflector ◽  
Distributed Bragg Reflector ◽  
Mode Laser ◽  
Perovskite Nanocrystals ◽  
Single Mode Laser ◽  
Gain Material ◽  
On Chip

A newly developed lithographic in-mold patterning process is proposed to fabricate on-chip single-mode distributed-Bragg-reflector waveguide small lasers that utilized CsPbBr3 perovskite nanocrystals as the gain material.

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