Overview
Background
Dr. Karl Bertling has made significant contributions to pioneering imaging and sensing via laser feedback interferometry, spanning diverse laser technologies including sensors based on visible lasers, infrared surface-emitting lasers, mid-infrared inter-band cascade lasers, and terahertz quantum cascade lasers. His current research focus includes leveraging terahertz quantum cascade laser feedback interferometry for early melanoma detection and agri-photonics, as well as near-field terahertz and mid-infrared imaging of nanomaterials and nanostructures.
Availability
- Dr Karl Bertling is:
- Available for supervision
Fields of research
Qualifications
- Bachelor of Science in Physics, The University of Queensland
- Bachelor (Honours) of Engineering - Electrical, The University of Queensland
- Masters (Research) of Engineering - Electrical, The University of Queensland
- Doctor of Philosophy, The University of Queensland
Works
Search Professor Karl Bertling’s works on UQ eSpace
2017
Journal Article
Surface roughness characterisation using optical feedback interferometry
Herbert, Jeremy, Bertling, Karl, Taimre, Thomas, Rakic, Aleksandar and Wilson, Stephen J. (2017). Surface roughness characterisation using optical feedback interferometry. Electronics Letters, 53 (4), 268-270. doi: 10.1049/el.2016.4134
2017
Conference Publication
Dynamic modelling of coupled-cavity Terahertz Quantum Cascade lasers with optical feedback
Xiaoqiong, Qi, Agnew, Gary, Kundu, Iman, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Han, She, Dean, Paul, Grier, Andrew, Valavanis, Alexander, Linfield, Edmund, Davies, A. Giles, Indjin, Dragan and Rakic, Aleksandar (2017). Dynamic modelling of coupled-cavity Terahertz Quantum Cascade lasers with optical feedback. ITQW 2017: 14th International Conference on Intersubband Transitions in Quantum Wells, Sands Expo and Convention Center, Singapore, 11-15 September 2017.
2016
Journal Article
Temperature dependent high speed dynamics of terahertz quantum cascade lasers
Agnew, Gary, Grier, Andrew, Taimre, Thomas, Bertling, Karl, Lim, Yah Leng, Ikonic, Zoran, Dean, Paul, Valavanis, Alexander, Harrison, Paul, Indjin, Dragan and Rakic, Aleksandar D. (2016). Temperature dependent high speed dynamics of terahertz quantum cascade lasers. IEEE Journal of Selected Topics in Quantum Electronics, 23 (99) 7792643, 1-9. doi: 10.1109/JSTQE.2016.2638539
2016
Journal Article
Origin of terminal voltage variations due to self-mixing in terahertz frequency quantum cascade lasers
Grier, Andrew, Dean, Paul, Valavanis, Alexander, Keeley, James, Kundu, Iman, Cooper, Jonathan D., Agnew, Gary, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Rakic, Aleksander D., Li, Lianhe H., Harrison, Paul, Linfield, Edmund, Ikonic, Zoran, Davies, A. Giles and Indjin, Dragan (2016). Origin of terminal voltage variations due to self-mixing in terahertz frequency quantum cascade lasers. Optics Express, 24 (19), 21948-21956. doi: 10.1364/OE.24.021948
2016
Journal Article
Concurrent reflectance confocal microscopy and laser doppler flowmetry to improve skin cancer imaging: a Monte Carlo model and experimental validation
Mowla, Alireza, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Wilson, Stephen J., Prow, Tarl W., Soyer, H. Peter and Rakic, Aleksandar D. (2016). Concurrent reflectance confocal microscopy and laser doppler flowmetry to improve skin cancer imaging: a Monte Carlo model and experimental validation. Sensors, 16 (9) 1411, 1411. doi: 10.3390/s16091411
2016
Journal Article
Model for a pulsed terahertz quantum cascade laser under optical feedback
Agnew, Gary, Grier, Andrew, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Ikonić, Zoran, Valavanis, Alexander, Dean, Paul, Cooper, Jonathan, Khanna, Suraj P., Lachab, Mohammad, Linfield, Edmund H., Davies, A. Giles, Harrison, Paul, Indjin, Dragan and Rakić, Aleksandar D. (2016). Model for a pulsed terahertz quantum cascade laser under optical feedback. Optics Express, 24 (18), 20554-20570. doi: 10.1364/OE.24.020554
2016
Journal Article
A compact laser imaging system for concurrent reflectance confocal microscopy and laser doppler flowmetry
Mowla, Alireza, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Wilson, Stephen J., Prow, Tarl W. and Rakic, Aleksandar D. (2016). A compact laser imaging system for concurrent reflectance confocal microscopy and laser doppler flowmetry. IEEE Photonics Journal, 8 (5) 3900709, 1-9. doi: 10.1109/JPHOT.2016.2599014
2016
Journal Article
Microwave head imaging system using analogue fibre-optic link for improved detection and localisation
Mohammed, B. J., Bertling, K., Abbosh, A. M. and Rakic, A. D. (2016). Microwave head imaging system using analogue fibre-optic link for improved detection and localisation. Electronics Letters, 52 (16), 1366-1368. doi: 10.1049/el.2016.1502
2016
Journal Article
Simple Electrical Modulation Scheme for Laser Feedback Imaging
Bertling, Karl, Taimre, Thomas, Agnew, Gary, Lim, Yah Leng, Dean, Paul, Indjin, Dragan, Hofling, Sven, Weih, Robert, Kamp, Martin, von Edlinger, Michael, Koeth, Johannes and Rakic, Aleksandar (2016). Simple Electrical Modulation Scheme for Laser Feedback Imaging. IEEE Sensors Journal, 16 (7) 7350095, 1937-1942. doi: 10.1109/JSEN.2015.2507184
2016
Journal Article
Laser feedback interferometry as a tool for analysis of granular materials at terahertz frequencies: towards imaging and identification of plastic explosives
Han, She, Bertling, Karl, Dean, Paul, Keeley, James, Burnett, Andrew D., Lim, Yah Leng, Khanna, Suraj P., Valavanis, Alexander, Linfield, Edmund H., Davies, A. Giles, Indjin, Dragan, Taimre, Thomas and Rakic, Aleksandar (2016). Laser feedback interferometry as a tool for analysis of granular materials at terahertz frequencies: towards imaging and identification of plastic explosives. Sensors, 16 (3) 352, 352+. doi: 10.3390/s16030352
2016
Conference Publication
Diffuse reflectance imaging for non-melanoma skin cancer detection using laser feedback interferometry
Mowla, Alireza, Taimre, Thomas, Lim, Yah L., Bertling, Karl, Wilson, Stephen J., Prow, Tarl W., Soyer, H. Peter and Rakić, Aleksandar D. (2016). Diffuse reflectance imaging for non-melanoma skin cancer detection using laser feedback interferometry. SPIE Photonics Europe, Brussels, Belguim, 3-7 April 2016. BELLINGHAM: SPIE. doi: 10.1117/12.2227449
2016
Conference Publication
Interferometry via thermal modulation in low duty cycle pulsed terahertz QCLs
Agnew, Gary, Grier, Andrew, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Ikonić, Zoran, Valavanis, Alexander, Dean, Paul, Cooper, Jonathan, Khanna, Suraj P., Lachab, Mohammad, Linfield, Edmund H., Davies, A. Giles, Harrison, Paul, Indjin, Dragan and Rakić, Aleksandar D. (2016). Interferometry via thermal modulation in low duty cycle pulsed terahertz QCLs. International Quantum Cascade Lasers School and Workshop 2016 (IQCLSW 2016), Cambridge, United Kingdom, 4 September – 9 September 2016.
2016
Conference Publication
Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
Rakic, Aleksandar D., Lim, Yah Leng, Taimre, Thomas, Agnew, Gary, Qi, Xiaoqiong, Bertling, Karl, Han, She, Wilson, Stephen J., Kundu, Iman, Grier, Andrew, Ikonić, Zoran, Valavanis, Alexander, Demić, Aleksandar, Keeley, James, Li, Lianhe H., Linfield, Edmund H., Davies, A. Giles, Harrison, Paul, Ferguson, Blake, Walker, Graeme, Prow, Tarl, Indjin, Dragan and Soyer, H. Peter (2016). Optical feedback effects on terahertz quantum cascade lasers: modelling and applications. Infrared, Millimeter-Wave, and Terahertz Technologies IV, Beijing, China, 12 October 2016. Bellingham, WA, United States: S P I E - International Society for Optical Engineering. doi: 10.1117/12.2250621
2016
Conference Publication
Self-mixing as a means of spectral characterisation of a Terahertz QCL
Keeley, J., Freeman, J., Valavanis, A., Mohandas, R., Bertling, Karl, Taimre, Thomas, Lim, Yah Leng, Li, L. H., Indjin, D., Rakic, Aleksandar, Linfield, E. H., Davies, A. G. and Dean, P. (2016). Self-mixing as a means of spectral characterisation of a Terahertz QCL. UK Semiconductors 2016, Sheffield, United Kingdom, 6-7 July 2016.
2016
Conference Publication
Laser feedback interferometry with THz QCLs: a new technology for imaging and materials analysis
Rakić, Aleksandar D., Agnew, Gary, Qi, Xiaoqiong, Taimre, Thomas, Grier, Andrew, Lim, Yah Leng, Bertling, Karl, Ikonić, Zoran, Valavanis, Alexander, Dean, Paul, Cooper, Jonathan, Khanna, Suraj P., Lachab, Mohammad, Wilson, Stephen J., Linfield, Edmund H., Davies, A. Giles, Harrison, Paul and Indjin, Dragan (2016). Laser feedback interferometry with THz QCLs: a new technology for imaging and materials analysis. The 8th International Symposium on Ultrafast Phenomena and Terahertz Waves, Chongqing, China, 10–12 October 2016. Washington, DC, United States: Optical Society of America. doi: 10.1364/ISUPTW.2016.IW4A.1
2016
Conference Publication
Prediction of Turn-on Delay in a Pulsed Terahertz Quantum Cascade Laser
Agnew, G., Grier, A., Taimre, T., Lim, Y. L., Bertling, K., Ikonic, Z., Valavanis, A., Dean, P., Cooper, J., Khanna, S. P., Lachab, M., Linfield, E. H., Davies, A. G., Harrison, P., Indjin, D. and Rakić, A. D. (2016). Prediction of Turn-on Delay in a Pulsed Terahertz Quantum Cascade Laser. Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD 2016), Sydney, Australia, 12-14 December 2016.
2016
Conference Publication
Terahertz Frequency Quantum Cascade Lasers: Optical Feedback Effects and Applications
Rakic, Aleksandar, Agnew, Gary, Qi, Xiaoqiong, Taimre, Thomas, Lim, Yah Leng, Bertling, Karl, Han, She, Wilson, Stephen J., Grier, Andrew, Kundu, Iman, Li, Lianhe, Valavanis, Alexander, Dean, Paul, Ikonic, Zoran, Cooper, Jonathan, Khanna, Suraj P., Lachab, Mohammad, Linfield, Edmund H., Davies, A. Giles, Harrison, Paul and Indjin, Dragan (2016). Terahertz Frequency Quantum Cascade Lasers: Optical Feedback Effects and Applications. 16th International Conference on Numerical Simulation of Optoelectronic Devices, Sydney, Australia, 11-15 July 2016. NEW YORK: IEEE. doi: 10.1109/NUSOD.2016.7546996
2016
Conference Publication
Spectral characterisation of a Terahertz QCL through self-mixing
Keeley, J., Freeman, J., Valavanis, A., Mohandas, R., Bertling, Karl, Taimre, Thomas, Lim, Yah Leng, Li, L. H., Indjin, D., Rakic, Aleksandar, Linfield, E. H., Davies, A. G. and Dean, P. (2016). Spectral characterisation of a Terahertz QCL through self-mixing. International Quantum Cascade Lasers School and Workshop 2016 (IQCLSW 2016), Cambridge, UK, 4-9 September 2016.
2015
Journal Article
Terahertz Radar Cross Section Characterization using Laser Feedback Interferometry with a Quantum Cascade Laser
Lui, H. S., Taimre, T., Bertling, K., Lim, Y. L., Dean, P., Khanna, S. P., Lachab, M, Valavanis, A., Indjin, D., Linfield, E. H., Davies, A. G. and Rakic, A. D. (2015). Terahertz Radar Cross Section Characterization using Laser Feedback Interferometry with a Quantum Cascade Laser. Electronics Letters, 51 (22), 1774-1776. doi: 10.1049/el.2015.2878
2015
Journal Article
Multiple signal classification for self-mixing flowmetry
Nikolic, Milan, Lim, Yah Leng, Bertling, Karl, Taimre, Thomas and Rakic, Aleksandar (2015). Multiple signal classification for self-mixing flowmetry. Applied Optics, 54 (9), 2193-2198. doi: 10.1364/AO.54.002193
Funding
Current funding
Past funding
Supervision
Availability
- Dr Karl Bertling is:
- Available for supervision
Looking for a supervisor? Read our advice on how to choose a supervisor.
Supervision history
Current supervision
-
Doctor Philosophy
Understanding contrast mechanisms of absorption spectroscopy of skin DNA solutions using biomolecule dynamics
Associate Advisor
Other advisors: Dr Tina Qi
-
Doctor Philosophy
Engineering Beam Profiles in Terahertz Quantum Cascade Lasers: An Electromagnetic Approach
Associate Advisor
Other advisors: Dr Tina Qi, Professor Aleksandar Rakic
-
Doctor Philosophy
Application of non-contact THz spectroscopic imaging towards preservation of heritage structures in India
Associate Advisor
Other advisors: Professor Aleksandar Rakic
Completed supervision
-
2025
Doctor Philosophy
Terahertz imaging using optical feedback in quantum cascade lasers
Associate Advisor
Other advisors: Dr Tina Qi, Professor Aleksandar Rakic
-
2022
Doctor Philosophy
Light-matter interactions at the nanoscale: a case for terahertz near-field spectroscopy in semiconductor nanodevices
Associate Advisor
Other advisors: Professor Aleksandar Rakic
Media
Enquiries
For media enquiries about Dr Karl Bertling's areas of expertise, story ideas and help finding experts, contact our Media team: