Optical feedback effects on terahertz quantum cascade lasers:  modelling and applications

Aleksandar D. Rakic; Yah Leng Lim; Thomas Taimre; Gary Agnew; Xiaoqiong Qi; Karl Bertling; She Han; Stephen J. Wilson; Iman Kundu; Andrew Grier; Zoran Ikonic; Alexander Valavanis; Aleksandar Demic; James Keeley; Lianhe H. Li; Edmund H. Linfield; A. Giles Davies; Paul Harrison; Blake Ferguson; Graeme Walker; Tarl Prow; Dragan Indjin; H. Peter Soyer

doi:10.1117/12.2250621

Optical feedback effects on terahertz quantum cascade lasers: modelling and applications

Aleksandar D. Rakic^*, Yah Leng Lim, Thomas Taimre, Gary Agnew, Xiaoqiong Qi, Karl Bertling, She Han, Stephen J. Wilson, Iman Kundu, Andrew Grier, Zoran Ikonic, Alexander Valavanis, Aleksandar Demic, James Keeley, Lianhe H. Li, Edmund H. Linfield, A. Giles Davies, Paul Harrison, Blake Ferguson, Graeme WalkerTarl Prow, Dragan Indjin, H. Peter Soyer

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Terahertz (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1-5 THz range with significant potential for applications in sensing and imaging. Laser feedback interferometry (LFI) with THz QCLs is a technique utilizing the sensitivity of the QCL to the radiation reflected back into the laser cavity from an external target. We will discuss modelling techniques and explore the applications of LFI in biological tissue imaging and will show that the confocal nature of the QCL in LFI systems, with their innate capacity for depth sectioning, makes them suitable for skin diagnostics with the well-known advantages of more conventional confocal microscopes. A demonstration of discrimination of neoplasia from healthy tissue using a THz, LFI-based system in the context of melanoma is presented using a transgenic mouse model.

Original language	English
Title of host publication	Infrared, Millimeter-Wave, and Terahertz Technologies IV
Editors	Cunlin Zhang, Xi-Cheng Zhang, Masahiko Tani
Publisher	SPIE
Number of pages	12
ISBN (Print)	978-1-5106-0480-3
DOIs	https://doi.org/10.1117/12.2250621
Publication status	Published - 8 Dec 2016
Externally published	Yes
Event	Conference on Infrared, Millimeter-Wave, and Terahertz Technologies IV - Beijing Duration: 12 Oct 2016 → 14 Oct 2016

Publication series

Name	Proceedings of SPIE
Publisher	SPIE-INT SOC OPTICAL ENGINEERING
Volume	10030
ISSN (Print)	0277-786X

Conference

Conference	Conference on Infrared, Millimeter-Wave, and Terahertz Technologies IV
City	Beijing
Period	12/10/16 → 14/10/16

Keywords

Terahertz imaging
Laser feedback interferometry
Quantum cascade lasers
Tissue imaging
FIBER RING LASER
SEMICONDUCTOR-LASERS
REFLECTION GEOMETRY
INTERFEROMETRY
TISSUE
SKIN
MODULATION
SPECTROSCOPY
FREQUENCIES
CARCINOMA

Access to Document

10.1117/12.2250621Licence: CC BY-NC-ND

Cite this

Rakic, A. D., Lim, Y. L., Taimre, T., Agnew, G., Qi, X., Bertling, K., Han, S., Wilson, S. J., Kundu, I., Grier, A., Ikonic, Z., Valavanis, A., Demic, A., Keeley, J., Li, L. H., Linfield, E. H., Davies, A. G., Harrison, P., Ferguson, B., ... Soyer, H. P. (2016). Optical feedback effects on terahertz quantum cascade lasers: modelling and applications. In C. Zhang, X.-C. Zhang, & M. Tani (Eds.), Infrared, Millimeter-Wave, and Terahertz Technologies IV (Proceedings of SPIE; Vol. 10030). SPIE. https://doi.org/10.1117/12.2250621

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title = "Optical feedback effects on terahertz quantum cascade lasers: modelling and applications",

abstract = "Terahertz (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1-5 THz range with significant potential for applications in sensing and imaging. Laser feedback interferometry (LFI) with THz QCLs is a technique utilizing the sensitivity of the QCL to the radiation reflected back into the laser cavity from an external target. We will discuss modelling techniques and explore the applications of LFI in biological tissue imaging and will show that the confocal nature of the QCL in LFI systems, with their innate capacity for depth sectioning, makes them suitable for skin diagnostics with the well-known advantages of more conventional confocal microscopes. A demonstration of discrimination of neoplasia from healthy tissue using a THz, LFI-based system in the context of melanoma is presented using a transgenic mouse model.",

keywords = "Terahertz imaging, Laser feedback interferometry, Quantum cascade lasers, Tissue imaging, FIBER RING LASER, SEMICONDUCTOR-LASERS, REFLECTION GEOMETRY, INTERFEROMETRY, TISSUE, SKIN, MODULATION, SPECTROSCOPY, FREQUENCIES, CARCINOMA",

author = "Rakic, {Aleksandar D.} and Lim, {Yah Leng} and Thomas Taimre and Gary Agnew and Xiaoqiong Qi and Karl Bertling and She Han and Wilson, {Stephen J.} and Iman Kundu and Andrew Grier and Zoran Ikonic and Alexander Valavanis and Aleksandar Demic and James Keeley and Li, {Lianhe H.} and Linfield, {Edmund H.} and Davies, {A. Giles} and Paul Harrison and Blake Ferguson and Graeme Walker and Tarl Prow and Dragan Indjin and Soyer, {H. Peter}",

note = "http://eprints.whiterose.ac.uk/109421/1/SPIE_PA2016_Beijing_Mk6.pdf; Conference on Infrared, Millimeter-Wave, and Terahertz Technologies IV ; Conference date: 12-10-2016 Through 14-10-2016",

year = "2016",

month = dec,

day = "8",

doi = "10.1117/12.2250621",

language = "English",

isbn = "978-1-5106-0480-3",

series = "Proceedings of SPIE",

publisher = "SPIE",

editor = "Cunlin Zhang and Xi-Cheng Zhang and Masahiko Tani",

booktitle = "Infrared, Millimeter-Wave, and Terahertz Technologies IV",

address = "United States",

}

Rakic, AD, Lim, YL, Taimre, T, Agnew, G, Qi, X, Bertling, K, Han, S, Wilson, SJ, Kundu, I, Grier, A, Ikonic, Z, Valavanis, A, Demic, A, Keeley, J, Li, LH, Linfield, EH, Davies, AG, Harrison, P, Ferguson, B, Walker, G, Prow, T, Indjin, D & Soyer, HP 2016, Optical feedback effects on terahertz quantum cascade lasers: modelling and applications. in C Zhang, X-C Zhang & M Tani (eds), Infrared, Millimeter-Wave, and Terahertz Technologies IV. Proceedings of SPIE, vol. 10030, SPIE, Conference on Infrared, Millimeter-Wave, and Terahertz Technologies IV, Beijing, 12/10/16. https://doi.org/10.1117/12.2250621

Optical feedback effects on terahertz quantum cascade lasers: modelling and applications. / Rakic, Aleksandar D.; Lim, Yah Leng; Taimre, Thomas et al.
Infrared, Millimeter-Wave, and Terahertz Technologies IV. ed. / Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani. SPIE, 2016. (Proceedings of SPIE; Vol. 10030).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Optical feedback effects on terahertz quantum cascade lasers

T2 - Conference on Infrared, Millimeter-Wave, and Terahertz Technologies IV

AU - Rakic, Aleksandar D.

AU - Lim, Yah Leng

AU - Taimre, Thomas

AU - Agnew, Gary

AU - Qi, Xiaoqiong

AU - Bertling, Karl

AU - Han, She

AU - Wilson, Stephen J.

AU - Kundu, Iman

AU - Grier, Andrew

AU - Ikonic, Zoran

AU - Valavanis, Alexander

AU - Demic, Aleksandar

AU - Keeley, James

AU - Li, Lianhe H.

AU - Linfield, Edmund H.

AU - Davies, A. Giles

AU - Harrison, Paul

AU - Ferguson, Blake

AU - Walker, Graeme

AU - Prow, Tarl

AU - Indjin, Dragan

AU - Soyer, H. Peter

N1 - http://eprints.whiterose.ac.uk/109421/1/SPIE_PA2016_Beijing_Mk6.pdf

PY - 2016/12/8

Y1 - 2016/12/8

N2 - Terahertz (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1-5 THz range with significant potential for applications in sensing and imaging. Laser feedback interferometry (LFI) with THz QCLs is a technique utilizing the sensitivity of the QCL to the radiation reflected back into the laser cavity from an external target. We will discuss modelling techniques and explore the applications of LFI in biological tissue imaging and will show that the confocal nature of the QCL in LFI systems, with their innate capacity for depth sectioning, makes them suitable for skin diagnostics with the well-known advantages of more conventional confocal microscopes. A demonstration of discrimination of neoplasia from healthy tissue using a THz, LFI-based system in the context of melanoma is presented using a transgenic mouse model.

AB - Terahertz (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1-5 THz range with significant potential for applications in sensing and imaging. Laser feedback interferometry (LFI) with THz QCLs is a technique utilizing the sensitivity of the QCL to the radiation reflected back into the laser cavity from an external target. We will discuss modelling techniques and explore the applications of LFI in biological tissue imaging and will show that the confocal nature of the QCL in LFI systems, with their innate capacity for depth sectioning, makes them suitable for skin diagnostics with the well-known advantages of more conventional confocal microscopes. A demonstration of discrimination of neoplasia from healthy tissue using a THz, LFI-based system in the context of melanoma is presented using a transgenic mouse model.

KW - Terahertz imaging

KW - Laser feedback interferometry

KW - Quantum cascade lasers

KW - Tissue imaging

KW - FIBER RING LASER

KW - SEMICONDUCTOR-LASERS

KW - REFLECTION GEOMETRY

KW - INTERFEROMETRY

KW - TISSUE

KW - SKIN

KW - MODULATION

KW - SPECTROSCOPY

KW - FREQUENCIES

KW - CARCINOMA

U2 - 10.1117/12.2250621

DO - 10.1117/12.2250621

M3 - Conference contribution

SN - 978-1-5106-0480-3

T3 - Proceedings of SPIE

BT - Infrared, Millimeter-Wave, and Terahertz Technologies IV

A2 - Zhang, Cunlin

A2 - Zhang, Xi-Cheng

A2 - Tani, Masahiko

PB - SPIE

Y2 - 12 October 2016 through 14 October 2016

ER -