UV LED fiber optic detection System for DNA and protein

Belz, Mathias; Klein, Felix A.; Habhegger, Heidi

doi:10.1117/12.717552

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…light-source dependent 6,7,8,9 . New, more sensitive and compact fiber optic spectroscopic applications and products were designed and established in a growing market 9,11,12 . UV fibers were used in high pressure liquid chromatography 13 , thin layer chromatography 14 , sensitive protein detection with UV LEDs and liquid core waveguides 15 , UV gas chromatography 16 , UV laser-based pollutant sensing 17 and colored dissolved organic matter (CDOM) detection in seawater 18 , only to name a few.…”

Section: Introductionmentioning

confidence: 99%

Influence of light-sources on UV fiber damage measured with DIN standard 58145

Raithel¹,

Langner²,

Belz³

et al. 2023

Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII

View full text Add to dashboard Cite

The DIN standard 58145 “Measuring method for determination of solarization effect of fused silica optical fibers” was introduced over 5 years ago to standardize the quality control for UV fibers. A deuterium lamp with a lens-based imaging system, coupling a light power density of approx. 200 µW/(cm2 nm) at 214 nm into the fiber under test, was specified as light-source. With time, the availability of new powerful broadband light-sources stimulated new applications. Further, improvements in deuterium lamps and imaging coupling systems resulted in higher light power densities. It was quickly determined that these new conditions induced different spectral and temporal UV losses, which needed to be studied. As a result, the cw-power coupled into the fibers under test, referenced at 214 nm in the original set-up, increased. We observed that two measurement systems, both assembled by the DIN standards recommendations, showed significant deviations in solarization effects at 215 nm (E’ center) and 265 nm (NBOH center). Therefore, we investigated ideal lens coupling conditions, influence of lens aging (solarization) and the influence of N2 purging of light-source and detector on permanent and transient solarization effects in fibers. A closer analysis and selective change of the spectral power between 190 nm and 260 nm wavelength coupled into silica-based fibers with undoped high-OH silica core is presented and an improved system for solarization measurements on UV fibers is recommended.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of light-sources on UV fiber damage measured with DIN standard 58145

Raithel¹,

Langner²,

Belz³

et al. 2023

Optical Fibers and Sensors for Medical Diagnostics, Treatment and Environmental Applications XXIII

View full text Add to dashboard Cite

show abstract

Preparation of deep UV transparent AlN substrates with high structural perfection for optoelectronic devices

et al. 2016

View full text Add to dashboard Cite

In this paper, the optimal growth conditions during the physical vapour transport of bulk AlN crystals are evaluated with regard to significantly increased deep UV transparency, while maintaining the high structural quality of the AlN crystals which are grown on N-polar c-facets. We show that carbon concentration [C], oxygen concentration [O], and the ratio between both concentrations [C]/[O] have a significant influence on the deep UV transparency. At 3[C] < [O] with [C] + [O] < 1019 cm−3, deep UV transparent AlN single crystals with absorption coefficients at around 265 nm (α265nm) smaller than 15 cm−1 can be prepared. These conditions can be achieved in the N-polar grown volume parts of the AlN crystals using growth temperatures in the range of TG = 2030–2050 °C and tungsten and tantalum carbide as getter materials for carbon and oxygen, respectively. Deep UV transparent AlN substrates (α265nm < 30 cm−1) ≥10 mm in diameter and of high crystalline perfection (rocking curve FWHM < 15 arcsec) are shown for the first time

show abstract

Optical Fiber Loss Analysis for an Application of Spectrophotometer System

et al. 2017

View full text Add to dashboard Cite

Loss analysis due to the insertion of optical fiber in short wavelength spectrophotometer system is experimentally conducted to improve resolution and flexibility of the system design. In this paper, type, length and bending diameter of the optical fiber are analyzed as a preliminary work towards the development of a low-loss spectrophotometer system. In order to analyze a suitable type of fiber to be adopted in this system, a 20 mm length and 0 mm bending diameter of a single-mode fiber (SMF), multi-mode fiber (MMF) and Polymethyl methacrylate (PMMA) fiber are tested. The length and bending diameter of the suitable fiber is then varied from 20 mm to 60 mm and 6 mm to 22 mm respectively. In this paper, light emitting diode (LED) centered at 525 nm wavelength with 35 nm full width half maximum (FWHM) is used as the spectrophotometer light source while silicon photodiode is used as the detector. In this work, photodetector output voltage is recorded to analyze the loss contributed by these three parameters. At this particular wavelength, PMMA is found to be a suitable fiber to be adopted due to its minimal loss performance. Besides the fiber type, having a minimal fiber length with maximal fiber bending diameter can reduce loss due to the insertion of optical fiber in spectrophotometer system, hence improving the spectrophotometer resolution performance.

show abstract

UV LED fiber optic detection System for DNA and protein

Cited by 3 publications

References 0 publications

Influence of light-sources on UV fiber damage measured with DIN standard 58145

Influence of light-sources on UV fiber damage measured with DIN standard 58145

Preparation of deep UV transparent AlN substrates with high structural perfection for optoelectronic devices

Optical Fiber Loss Analysis for an Application of Spectrophotometer System

Contact Info

Product

Resources

About