Light-emitting-diode Fourier-transform spectroscopy of HD16O between 11200 and 12400 cm-1

A new version of the photodiode array Fourier transform spectrometer for visible spectroscopy is described. In this version, a birefringent interferometer with a Wollaston prism produces a spatial interferogram of the radiation, which is detected by a linear photodiode array. In addition to the merit of having no mechanical moving parts, this spectrometer has the beneficial advantage of the simple and rugged optical setup and alignment due to its common-path and in-line interferometer formation. These advantages lend this spectrometer to field-use applications. Emission spectra of a low-pressure mercury lamp and a light-emitting diode and an absorption spectrum of a didymium glass filter measured by the developed spectrometer are presented.

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Fourier Transform–Raman and Reflectance Studies on Dental Enamel Bleached with Hydrogen Peroxide Activated Using a Light-Emitting Diode–Laser System

Photomedicine and Laser Surgery ◽

10.1089/pho.2008.2409 ◽

2009 ◽

Vol 27 (6) ◽

pp. 913-919 ◽

Cited By ~ 4

Author(s):

Ilene Cristine Rosia Cesar ◽

Luís Eduardo Silva Soares ◽

Leandro Procópio Alves ◽

Airton Abrahão Martin ◽

Egberto Munin ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Fourier Transform ◽

Diode Laser ◽

Light Emitting Diode ◽

Laser System ◽

Dental Enamel ◽

Light Emitting ◽

Fourier Transform Raman

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Enhanced Static Modulated Fourier Transform Spectrometer for Fast Approximation in Field Application

Molecules ◽

10.3390/molecules26113312 ◽

2021 ◽

Vol 26 (11) ◽

pp. 3312

Author(s):

Ju Yong Cho ◽

Won Chun Oh ◽

Won Kweon Jang

Keyword(s):

Fourier Transform ◽

Light Emitting Diode ◽

Spectral Width ◽

Peak Shift ◽

Field Application ◽

Spectral Peak ◽

Fourier Transform Spectrometer ◽

Data Sampling ◽

Light Emitting ◽

Operating Current

We discuss the data sampling frequency, the spectral resolution, and the limit for non-aliasing in the static modulated Fourier transform spectrometer based on a modified Sagnac interferometer. The measurement was performed in a very short 4 ms, which is applicable for real time field operation. The improved spectrometer characteristics were used to investigate the spectral properties of an InGaAs light emitting diode. In addition, The measured spectral peak was shifted from 6420 cm−1 to 6365 cm−1, as the temperature increased from 25 °C to 40 °C, when the operating current is fixed to be 0.55 A. As the applied current increased from 0.30 A to 0.55 A at room temperature, the spectral width was broadened from 316 cm−1 to 384 cm−1. Compared to the conventional Fourier transform spectrometer, the measured spectral width by the static modulated Fourier transform spectrometer showed a deviation less than 10%, and the spectral peak shift according to the temperature rise showed a difference within 2%.

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High-speed non-invasive thermal analysis of high-power light-emitting diode arrays

10.32469/10355/8133 ◽

2010 ◽

Author(s):

Nicholas M. Rada

Keyword(s):

Thermal Analysis ◽

High Power ◽

High Speed ◽

Light Emitting Diode ◽

Light Emitting ◽

Non Invasive

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Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

10.32792/utq/utjsci/vol7/2/31 ◽

2020 ◽

pp. 144-148

Keyword(s):

Quantum Dot ◽

Delay Time ◽

Chaos Synchronization ◽

Optical Feedback ◽

Light Emitting Diode ◽

Feedback Effect ◽

Complete Synchronization ◽

Light Emitting ◽

Coupling Methods ◽

Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

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