Deep Seated Negative Axicon in Selective Optical Fiber Tip and Collimated Bessel Beam

Vairagi, Kaushal; Minz, Rashmi A.; Kaur, Sarabjeet; Kumbhakar, Dharmadas; Paul, Sambhav; Tiwari, Umesh; Sinha, R. K.; Fick, Jochen; Mondal, Samir K.

doi:10.1109/lpt.2017.2684224

Cited by 27 publications

(7 citation statements)

References 21 publications

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“…The dimensions of the axicon are measured as ~300µm long and ~60µm wide at opening that reduced gradually at the apex to ~3µm. The brief description about axicon fabrication can be found in our previous work [9]. This axicon structure converts the Gaussian beam into the Bessel beam having a large depth-…”

Section: Experimental Setup 21 Bessel Beam Axicon Probementioning

confidence: 99%

“…The DOF can be extended by free space micro-optic axicon lens, in-fiber axicon lens at the tip, and all-fiber optical probe consists gradient-index (GRIN) lens with no core fiber (NCF). Among these approaches, in-fiber probe [8] forms positive axicon structure have simple probe fabrication and setup with maximum ~600μm DOF which can be further extended by using the recently developed fiber-based negative axicon having ~700μm DOF [9].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, a Bessel beam axicon probe [9] based common-path OCT system is proposed for malignancy detection. The human colon tissue including both normal and malignant tissue types are differentiated which shows the promising potential of our system.…”

Section: Introductionmentioning

confidence: 99%

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Common-path optical coherence tomography using Bessel beam axicon probe for malignancy identification

Gupta¹,

Vairagi²,

Sharma³

et al. 2023

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII

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The ability to detect the malignancy inside the tissue structure non-invasively have immense potential in the clinical application. In this work, a Bessel beam axicon probe based common-path optical coherence tomography system is demonstrated for detection of malignancy inside the human tissue. This probe is employed in this system having an axicon structure which is chemically etched inside the optical fiber end. This probe generates a quality Bessel beam owning a large depth-of-field, ~700µm and small central spot size. This probe effectively identifies the malignancy in the human colon tissue hence it could be a great tool as an endoscopic probe in future for either early-stage or during surgery diagnosis.

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Section: Experimental Setup 21 Bessel Beam Axicon Probementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Common-path optical coherence tomography using Bessel beam axicon probe for malignancy identification

Gupta¹,

Vairagi²,

Sharma³

et al. 2023

Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII

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“…Considerable work is being conducted on BB construction using optical fibers and deep-sealed negative axicons (DSNAs) [ 150 , 151 ]. The DSNA is manufactured by standard chemical etching in hydrofluoric acid (HF) at the tip of the single-mode highly doped photosensitive optical fiber and produces BB [ 152 ]. A tomography methodology for fluorescence microscopy scanning is introduced in [ 153 ], which enables the volume image to be captured in a single frame scan.…”

Section: Bb For Optical Coherence Tomographymentioning

confidence: 99%

Bessel Beam: Significance and Applications—A Progressive Review

et al. 2020

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Diffraction is a phenomenon related to the wave nature of light and arises when a propagating wave comes across an obstacle. Consequently, the wave can be transformed in amplitude or phase and diffraction occurs. Those parts of the wavefront avoiding an obstacle form a diffraction pattern after interfering with each other. In this review paper, we have discussed the topic of non-diffractive beams, explicitly Bessel beams. Such beams provide some resistance to diffraction and hence are hypothetically a phenomenal alternate to Gaussian beams in several circumstances. Several outstanding applications are coined to Bessel beams and have been employed in commercial applications. We have discussed several hot applications based on these magnificent beams such as optical trapping, material processing, free-space long-distance self-healing beams, optical coherence tomography, superresolution, sharp focusing, polarization transformation, increased depth of focus, birefringence detection based on astigmatic transformed BB and encryption in optical communication. According to our knowledge, each topic presented in this review is justifiably explained.

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“…High pulse intensities are known to cause plasma production and filamentation in the air, which should be avoided to ensure a safe and manageable ultra-short pulsed laser machining procedure. Negative axicons can be used to solve the generation of BBs with the additional focal length by splitting rather than superimposing the incoming GB [ 4 ]. A GB is transmitted through a negative axicon through a ring-shaped beam (later abbreviated as RSB) profile that can be focused later to create a BB.…”

Section: Introductionmentioning

confidence: 99%

Modern Types of Axicons: New Functions and Applications

Хонина

Kazanskiy

Khorin

et al. 2021

Sensors

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Axicon is a versatile optical element for forming a zero-order Bessel beam, including high-power laser radiation schemes. Nevertheless, it has drawbacks such as the produced beam’s parameters being dependent on a particular element, the output beam’s intensity distribution being dependent on the quality of element manufacturing, and uneven axial intensity distribution. To address these issues, extensive research has been undertaken to develop nondiffracting beams using a variety of advanced techniques. We looked at four different and special approaches for creating nondiffracting beams in this article. Diffractive axicons, meta-axicons-flat optics, spatial light modulators, and photonic integrated circuit-based axicons are among these approaches. Lately, there has been noteworthy curiosity in reducing the thickness and weight of axicons by exploiting diffraction. Meta-axicons, which are ultrathin flat optical elements made up of metasurfaces built up of arrays of subwavelength optical antennas, are one way to address such needs. In addition, when compared to their traditional refractive and diffractive equivalents, meta-axicons have a number of distinguishing advantages, including aberration correction, active tunability, and semi-transparency. This paper is not intended to be a critique of any method. We have outlined the most recent advancements in this field and let readers determine which approach best meets their needs based on the ease of fabrication and utilization. Moreover, one section is devoted to applications of axicons utilized as sensors of optical properties of devices and elements as well as singular beams states and wavefront features.

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Deep Seated Negative Axicon in Selective Optical Fiber Tip and Collimated Bessel Beam

Cited by 27 publications

References 21 publications

Common-path optical coherence tomography using Bessel beam axicon probe for malignancy identification

Common-path optical coherence tomography using Bessel beam axicon probe for malignancy identification

Bessel Beam: Significance and Applications—A Progressive Review

Modern Types of Axicons: New Functions and Applications

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