MBE growth of vertical-cavity surface-emitting laser structure without real-time monitoring

1999 ◽  
Vol 201-202 ◽  
pp. 1005-1009 ◽  
Author(s):  
C.Z Wu ◽  
Y Tsou ◽  
C.M Tsai
Keyword(s):  
Real Time ◽  
Laser Structure ◽  
Cavity Surface ◽  
Real Time Monitoring ◽  
Mbe Growth ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

scholarly journals Growth and fabrication of 850 nm AlGaAs/GaAs vertical cavity surface emitting laser structure

2019 ◽  
Vol 1217 ◽  
pp. 012003
Author(s):  
N I Cabello ◽  
P M Tingzon ◽  
H A Husay ◽  
J D Vasquez ◽  
R Jagus ◽  
...  
Keyword(s):  
Laser Structure ◽  
Cavity Surface ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

Real-Time Mechanical-Encoding of Needle Shape for Image-Guided Medical and Surgical Interventions

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Mohamad Abbass ◽  
Stacy Fan ◽  
Kevin Barker ◽  
Aaron Fenster ◽  
Jeremy Cepek
Keyword(s):  
Real Time ◽  
Beam Theory ◽  
Cavity Surface ◽  
Treatment Delivery ◽  
Surgical Interventions ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Euler Bernoulli Beam ◽  
Vertical Cavity ◽  
Prototype Design

Error and uncertainty in needle placement can drastically impact the clinical outcome of both diagnostic and therapeutic needle-based procedures. In this work, we aim to estimate the shape of a bent needle during insertion and provide a prototype design of a needle whose deflection is tracked in real time. We calculate slope along a needle by measuring the movement of fixed wires running along its length with a compact image-based sensor. Through the use of the Euler–Bernoulli beam theory, we calculate shape and trajectory of a needle. We constructed a prototype needle with two wires fixed along its length and measured wire-movement using a vertical-cavity surface-emitting laser (VCSEL) mouse sensor. This method was able to estimate needle tip deflection within 1 mm in a variety of deflection scenarios in real time. We then provide a design of a needle with real-time deflection tracking in 3D, providing the user with a simple display to convey needle deflection in tissue. This method could be applied to needle-based biopsy or therapy procedures to improve the diagnostic accuracy or treatment delivery quality.

Coupling effect in a vertical-cavity surface-emitting laser structure observed by photoreflectance spectroscopy

1997 ◽  
Author(s):  
P. D. Berger ◽  
C. Bru-Chevallier ◽  
Taha Benyattou ◽  
Gerard Guillot ◽  
Philippe Grosse ◽  
...  
Keyword(s):  
Coupling Effect ◽  
Laser Structure ◽  
Cavity Surface ◽  
Photoreflectance Spectroscopy ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity
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