scholarly journals Theoretical and experimental study of polarization switching in long-wavelength VCSELs subject to parallel optical injection

2016 ◽  
Author(s):  
A. Quirce ◽  
P. Pérez ◽  
A. Popp ◽  
A. Valle ◽  
L. Pesquera ◽  
...  
Keyword(s):  
Experimental Study ◽  
Polarization Switching ◽  
Optical Injection ◽  
Long Wavelength

Polarization Switching in Long-Wavelength VCSELs Subject to Orthogonal Optical Injection

2011 ◽  
Vol 47 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Marita Torre ◽  
Antonio Hurtado ◽  
Ana Quirce ◽  
Angel Valle ◽  
Luis Pesquera ◽  
...  
Keyword(s):  
Polarization Switching ◽  
Optical Injection ◽  
Long Wavelength

Quasi-Experimental study of effects of lighting on rest, activity and melatonin in postpartum women

2021 ◽  
Vol 74 (6) ◽  
Author(s):  
Cristina Furtado Volcov ◽  
Eliana Moreira Pinheiro ◽  
Miriam Harumi Tsunemi ◽  
Fernanda Gaspar do Amaral ◽  
Ariane Ferreira Machado Avelar ◽  
...  
Keyword(s):  
Experimental Study ◽  
Comparison Group ◽  
Total Load ◽  
Long Wavelength ◽  
Light Regimen ◽  
Early Postpartum ◽  
Comparison Groups ◽  
Quasi Experimental ◽  
The Mean ◽  
Experimental Group

ABSTRACT Objectives: to compare the parameters of the activity/rest cycle of early postpartum breastfeeding women under a controlled and uncontrolled long wavelength ray light regimen. Methods: quasi-experimental study with breastfeeding women and their babies during postnatal rooming-in, São Paulo, Brazil. Participants were allocated to either an experimental (intervention) or a comparison group. The intervention involved exposure of the woman in a controlled room with artificial long wavelength ray light at night. Each woman’s level of 6-sulfatoxymelatonin at 24 hours and activity/rest times was analyzed. Results: the mean activity/rest times of women in the experimental and comparison groups were similar. The mean percentages of total load of 6-sulfatoxymelatonin during the day and night were similar (p=0.09). At 24 hours, the experimental group presented a significantly lower mean percentage of total load compared to the comparison group (p=0.04). Conclusions: women who stayed in the room with long-wavelength artificial light showed no difference in activity/rest and 6-sulfatoxymelatonin levels in the early postpartum period.

Polarization switching characteristics in a 1550??nm VCSEL subject to circularly polarized optical injection

2016 ◽  
Vol 14 (2) ◽  
pp. 021401-21405 ◽  
Author(s):  
Haiying Qiu Haiying Qiu ◽  
Zhengmao Wu Zhengmao Wu ◽  
Tao Deng Tao Deng ◽  
Yang He Yang He ◽  
and Guangqiong Xia and Guangqiong Xia
Keyword(s):  
Polarization Switching ◽  
Optical Injection ◽  
Circularly Polarized ◽  
Switching Characteristics

Measuring Strain Distribution During Mesoscopic Domain Reorientation in a Ferroelectric Material

1998 ◽  
Vol 120 (1) ◽  
pp. 1-6 ◽  
Author(s):  
S. B. Park ◽  
S. S. Park ◽  
G. P. Carman ◽  
H. T. Hahn
Keyword(s):  
Experimental Study ◽  
Strain Distribution ◽  
Large Strain ◽  
Polarization Switching ◽  
Ferroelectric Material ◽  
Nonlinear Phenomena ◽  
Moire Interferometry ◽  
Microcrack Initiation ◽  
Shear Strains ◽  
Domain Reorientation

In this paper, we present the results of an experimental study focused on understanding the strain concentrations arising due to nonlinear phenomena associated with polarization switching. A moire interferometry technique is used to measure the normal and shear strains of a PZT-5H piezoceramic undergoing 180 and 90 deg switching. These results include the strain concentrations measured between polarized regions oriented 180 and 90 deg apart. The results show that very large strain mismatches (e.g., as large as 4500 microstrains) occur along the boundary of dissimilar oriented domains, suggesting a source of microcrack initiation and fatigue degradation.

Injection Locking and Polarization Switching Bistability in a 1550 nm VCSEL Subject to Parallel Optical Injection

2017 ◽  
Vol 23 (6) ◽  
pp. 1-10 ◽  
Author(s):  
Florian Denis-le Coarer ◽  
Ana Quirce ◽  
Pablo Perez ◽  
Angel Valle ◽  
Luis Pesquera ◽  
...  
Keyword(s):  
Polarization Switching ◽  
Injection Locking ◽  
Optical Injection
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