&lt;title&gt;Recent advances in the development of a fiber-optic-based instrument for on-line Raman analysis&lt;/title&gt;

Kercel, Stephen W.; Roberts, Michael James; Garrison, Arlene A.

doi:10.1117/12.22904

Cited by 4 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The potential use of fiber optic Raman systems for process control has been considered (57). A disposable protective sheath has been described for use with fiber optic probes (58), and a fiber optic based instrument for on-line Raman analysis has been developed (59). The application of such a probe to a wide range of samples has been reported (60), and the use of a fiber optic system coupled to capillary glass tubes for the analysis of liquids and solutions offers a potential for signal enhancement (61).…”

Section: Instrumentation and Samplingmentioning

confidence: 99%

Raman spectroscopy

Gerrard¹,

Birnie²

1992

Anal. Chem.

View full text Add to dashboard Cite

Section: Instrumentation and Samplingmentioning

confidence: 99%

Raman spectroscopy

Gerrard¹,

Birnie²

1992

Anal. Chem.

View full text Add to dashboard Cite

“…These fibers have a low loss and a much smaller diameter, which is suitable for collecting and transmitting the Raman spectrum from the tissue surface to the detector cameras 7 – 9 PCFs have a complex structure that can be changed by varying geometric parameters. The variables are the hole diameter (d), hole center distances from each other (the lattice constant Λ), number of layers that make up the cladding, and properties of the fiber material 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

Ultrabend resistant circular photonic crystal fiber design for cancer diagnosis by Raman spectrometer

2022

View full text Add to dashboard Cite

One of the ways to diagnose cancer in its early stages, which can lead to timely treatment, is to use Raman spectroscopy. The Raman spectrum of a material is created by the interaction of light with the material; it determines the exact characteristics and properties of the material, which can be used to distinguish cancerous cells from healthy ones. However, the intensity of this spectrum is weak, and the optical fibers used in these devices must have very little loss and thus have low sensitivity to bending. This paper proposes a circular photonic crystal fiber with a structure in which the losses in different bending radii are significantly reduced. The modified state of the fiber at the wavelength of 1.55 μm supports the transmission of 10 modes propagated in the core. The loss for the fundamental mode at this wavelength and bending radius of 2 mm equals 3.82 × 10 −16 dB∕m, which is considered a low value. As the bending radius decreases further, low-order modes diminish, which are more sensitive to bending than high-order modes. However, their losses are lower than in high-order modes. The critical bending radius for this fiber, with the loss reaching 0.1 dB∕m, is equal to 0.096 mm. This low critical bending radius shows the low sensitivity of the proposed fiber to bending. The fiber was examined in different bending radii and wavelengths, and the parameters of this structure were presented for the lowest bending losses, which can be used in Raman spectrometers as spectrum collecting fibers and improve cancer diagnosis devices with Raman spectrum.

show abstract