scholarly journals Исследование динамики выходной оптической мощности полупроводниковых лазеров (1070 nm) с маломодовым латеральным волноводом мезаполосковой конструкции при сверхвысоких токах накачки

2021 ◽  
Vol 47 (7) ◽  
pp. 42
Author(s):  
И.С. Шашкин ◽  
А.Ю. Лешко ◽  
В.В. Шамахов ◽  
Д.Н. Романович ◽  
В.А. Капитонов ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Peak Power ◽  
Initial Level ◽  
Near Field ◽  
Spatial Dynamics ◽  
Pump Current ◽  
Mode Competition ◽  
The Third ◽  
Profile Variation ◽  
Mesa Stripe

At ultrahigh levels of pulsed current pumping, the characteristics of semiconductor lasers based on an asymmetric heterostructure with a broadened lateral waveguide of a mesa-stripe design are studied. A peak power of 5.1 W is demonstrated at a pump current amplitude of 10 A. Three types of spatial dynamics of laser radiation are determined: the first one is a slow (~ 200 ns) intensity profile variation along the lateral near field at initial level of pump currents; the second one is a presence of fast (~ 10 ns) processes of mode competition at moderate pump currents; the third one is a chaotic temporal behavior of the output power at maximum pump currents.

scholarly journals Rate equations model for semiconductor lasers with multilongitudinal mode competition and gain dynamics

2003 ◽  
Vol 39 (10) ◽  
pp. 1229-1237 ◽  
Author(s):  
M. Yousefi ◽  
A. Barsella ◽  
D. Lenstra ◽  
G. Morthier ◽  
R. Baets ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Mode Competition ◽  
Rate Equations

HISTOLOGICAL EVIDENCE FOR CELLULAR ADAPTATION TO NON-FREEZING COLD INJURY

1959 ◽  
Vol 37 (7) ◽  
pp. 811-819 ◽  
Author(s):  
O. Héroux
Keyword(s):  
Thermal Damage ◽  
Initial Level ◽  
Cellular Membrane ◽  
Cold Injury ◽  
Histological Changes ◽  
Inflammatory Reactions ◽  
Histological Evidence ◽  
Ionic Transfer ◽  
The Third ◽  
Parallel Increase

The development and the healing of non-freezing cold injury in ears of rats maintained at 6 °C for 118 days and followed at different times of exposure revealed histological changes of a different nature at 4–6 mm away from the edge of the ear from the changes at 1–3 mm. In the first 3 mm during the first 21 days of exposure there was a continuous drop in the number of prophases and telophases and a parallel increase in the number of blocked and degenerating metaphases. In the second week, inflammatory reactions appeared; in the third week, the edema and lymphocyte infiltration was quite severe, and at that time 10% of the epithelium was degenerating. At the end of the fourth week, in the non-necrotic part of the epidermis, the number of prophases and telophases had returned to the initial level and the number of blocked metaphases was back to normal. After 56 to 118 days, no signs of edema, necrosis, or blocked metaphases could be found. In summary, the cold injury developed in the first 3 or 4 weeks and healed in the following month. After 2 months, cold temperature had no damaging effect on the epidermal tissue.At 4–6 mm from the edge of the ear, no cold injury developed, but in the first week there was a slight degree of mitotic blocking which disappeared during the second week. Essentially the same picture was observed at the 1–3 mm location in the ears of rats kept at 15 °C.On the assumption that mitotic blocking is due to a disturbance of the ionic transfer through the cellular membrane, it is suggested that the primary cause of cold injury is a direct thermal damage to the membrane.

From Near-Field to Far-Field Coupling in the Third Dimension: Retarded Interaction of Particle Plasmons

Nano Letters ◽  
2011 ◽  
Vol 11 (10) ◽  
pp. 4421-4424 ◽  
Author(s):  
Richard Taubert ◽  
Ralf Ameling ◽  
Thomas Weiss ◽  
André Christ ◽  
Harald Giessen
Keyword(s):  
Near Field ◽  
Far Field ◽  
Field Coupling ◽  
The Third ◽  
Third Dimension
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