Stable ultrashort laser diode pulse generator

1981 ◽  
Vol 52 (4) ◽  
pp. 579-581 ◽  
Author(s):  
Y. Tsuchiya ◽  
A. Takeshima ◽  
M. Hosoda
Keyword(s):  
Laser Diode ◽  
Pulse Generator ◽  
Ultrashort Laser

scholarly journals Low-cost laser diode pulse generator for quantum information applications

2021 ◽  
Vol 2145 (1) ◽  
pp. 012058
Author(s):  
S Buathong ◽  
J Janpoon ◽  
N Suksawat ◽  
S Deachapunya
Keyword(s):  
Quantum Information ◽  
Laser Diode ◽  
Pulse Generator ◽  
Single Photon ◽  
Short Pulse ◽  
Electric Pulse ◽  
Low Cost ◽  
Laser Pulses ◽  
Function Generator ◽  
Generator Circuit

Abstract A simple short-pulse generator circuit based on electronic gates is designed for short electric pulse of about 12 ns at Full Width at Half Maximum (FWHM) and 3.6 Volt amplitude for driving a laser diode. Using our circuit with a 780 nm laser diode designed and fabricated for producing short light pulses. The circuit utilizes an AND gate, a XOR gate, and a common function generator, provides a repetition rate from DC up to 1 MHz. The laser pulses were generated and then detected via an avalanche photodiodes (APD). This finding can benefit the field of light-based quantum information including single photon experiments.

Low-Time-Jitter Short-Pulse Generator Using Compact Gain-Switching Laser Diode Module With Optical Feedback Fiber Line

2008 ◽  
Vol 47 (8) ◽  
pp. 6754-6756 ◽  
Author(s):  
Koji Nonaka ◽  
Hiroaki Mizuno ◽  
Hongbin Song ◽  
Nobuyasu Kitaoka ◽  
Akihito Otani
Keyword(s):  
Laser Diode ◽  
Pulse Generator ◽  
Optical Feedback ◽  
Short Pulse ◽  
Time Jitter ◽  
Gain Switching

Implanted vagus nerve stimulation in 126 patients: surgical technique and complications

2020 ◽  
Vol 99 (7) ◽  
Keyword(s):  
Vagus Nerve ◽  
Vocal Cord ◽  
Nerve Stimulation ◽  
Vagus Nerve Stimulation ◽  
Pulse Generator ◽  
Operative Procedure ◽  
Intractable Epilepsy ◽  
Vagal Nerve ◽  
University Hospital ◽  
Nerve Stimulator

Introduction: Vagus nerve stimulation is a palliative treatment for patients with refractory epilepsy to reduce the frequency and intensity of seizures. A bipolar helical electrode is placed around the left vagus nerve at the cervical level and is connected to the pulse generator placed in a subcutaneous pocket, most commonly in the subclavian region. Methods: Between March 1998 and October 2019, we performed 196 procedures related to the vagal nerve stimulation at the Neurosurgery Department in Motol University Hospital. Of these, 126 patients were vagal nerve stimulator implantation surgeries for intractable epilepsy. The cases included 69 female and 57 male patients with mean age at the time of the implantation surgery 22±12.4 years (range 2.1−58.4 years). Results: Nine patients (7.1%) were afflicted by complications related to implantation. Surgical complications included postoperative infection in 1.6%, VNS-associated arrhythmias in 1.6%, jugular vein bleeding in 0.8% and vocal cord paresis in 2.4%. One patient with vocal cord palsy also suffered from severe dysphagia. One patient (0.8%) did not tolerate extra stimulation with magnet due to a prolonged spasm in his throat. The extra added benefit of vagus stimulation in one patient was a significant reduction of previously regular severe headaches. Conclusion: Vagus nerve stimulation is an appropriate treatment for patients with drug-resistant epilepsy who are not candidates for focal resective surgery. Implantation of the vagus nerve stimulator is a relatively safe operative procedure.

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