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Resources for Mid-IR Hollow Fibers

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Much of the pioneering work on hollow fiber optics (i.e., waveguides) was done by Jim Harrington at Rutgers University, and his book (Infrared Fibers and Their Applications) is an excellent summary of the theory, fabrication, and use. OptoKnowledge has a close collaboration with Rutgers. This has included transition of the Rutgers technology to OptoKnowledge, as well as joint efforts to advance the state of the art. In addition, OptoKnowledge has developed relationships with researchers and industrial users of Mid-IR technology and understand the needs for beam delivery and signal collection. Below is a list of recent publications  
 
General Mid-IR Hollow Fiber:

Kriesel, J.M., Gat, N., Bernacki, B.E., Erikson, R.L., Cannon, B.D., Myers, T.L., Bledt, C.M., and Harrington, J.A., "Hollow Core Fiber Optics for Mid-Wave and Long-Wave Infrared Spectroscopy," Proc. SPIE Vol 8018, DOI: 10.1117/12.882840 (2011).

Kriesel, Jason; Gat, Nahum; Bernacki, Bruce; Myers, Tanya; Bledt, Carlos; and Harrington, James; "Fiber delivery of mid-IR lasers," (SPIE Newsroom. DOI: 10.1117/2.1201108.003794) August 2011.

C. M. Bledt, J. A. Harrington, and J. M. Kriesel, "Loss and modal properties of Ag/AgI hollow glass waveguides," Appl. Opt. 51, 3114-3119 (2012).

Harrington, J.A., Bledt, C.M., and Kriesel, J.M., "Hollow waveguides for the transmission of quantum cascade laser (QCL) energy for spectroscopic applications," Paper #7894-14, Proc. SPIE Vol. 7894, DOI: 10.1117/12.881548 (2011).

 
Single-Mode Delivery and Mode-Filtering:

J.M. Kriesel, G.M. Hagglund, N. Gat, V. Spagnolo, and P. Patimisco, "Spatial mode filtering of mid-infrared (mid-IR) laser beams with hollow core fiber optics," SPIE Proceedings Vol. 8993, DOI: 10.1117/12.2040018 (2013).

P. Patimisco, A. Sampaolo, L. Mihai, M. Giglio, J. Kriesel, D. Sporea, G. Scamarcio, F. K. Tittel, and V. Spagnolo, "Low-Loss Coupling of Quantum Cascade Lasers into Hollow-Core Waveguides with Single-Mode Output in the 3.7–7.6 µm Spectral Range", Sensors, 16(4), 533; doi: 10.3390/s16040533 (2016).

A. Sampaolo, P. Patimisco, J. M. Kriesel, F. K. Tittel, G. Scamarcio, and V. Spagnolo, "Single mode operation with mid-IR hollow fibers in the range 5.1-10.5 µm", Optics Express 195, DOI:10.1364/OE.23.000195, (2015).

P. Patimisco, A. Sampaolo, M. Giglio, J. M. Kriesel, F. K. Tittel, and V. Spagnolo, "Hollow core waveguide as mid-infrared laser modal beam filter, J. Appl. Phys. 118, 113102 (2015)

 
Advanced Fiber Structures:

C.M. Bledt, J.A. Harrington, and J.M. Kriesel, "Multilayer silver / dielectric thin-film coated hollow waveguides for sensor and laser power delivery applications", Proc. SPIE Vol. 8218, DOI: 10.1117/12.912196 (2012).

C. M. Bledt, D. V. Kopp, J. A. Harrington, S. Kino, Y. Matsuura and J. M. Kriesel, “Investigation of tapered silver / silver halide coated hollow glass waveguides for the transmission of CO2 laser radiation”, Proc. SPIE Vol. 8218, DOI: 10.1117/12.912201 (2012).

C.M. Bledt, D.V. Kopp, J.A. Harrington, and J.M. Kriesel, "Multilayer thin film coatings for reduced infrared loss in hollow glass waveguides" Proc. of SPIE Vol. 8011 80112I-1, (2011).

 
Sensor Use:

Jason M. Kriesel; Camille N. Makarem; Mark C. Phillips; James J. Moran; Max L. Coleman; Lance E. Christensen; James F. Kelly, "Versatile, ultra-low sample volume gas analyzer using a rapid, broad-tuning ECQCL and a hollow fiber gas cell," Proc SPIE. 10210; doi:10.1117/12.2262612 (2017).

J.F. Kelly, R.L. Sams, T.A. Blake, and J.M. Kriesel, "Further developments of capillary absorption spectrometers using small hollow-waveguide fibers", SPIE Proceedings Vol. 8993, DOI: 10.1117/12.2042734 (2013).

V. Spagnolo, P. Patimisco, S. Borri, G. Scamarcio, B.E. Bernacki, and J. Kriesel, "Mid-infrared fiber-coupled QCL-QEPAS sensor," Applied Physics B, Lasers and Optics, DOI 10.1007/s00340-013-5388-3 (2013).

V. Spagnolo, P. Patimisco, S. Borri, G. Scamarcio, B. E. Bernacki, and J. Kriesel, "Part-per-trillion level SF6 detection using a quartz enhanced photoacoustic spectroscopy-based sensor with single-mode fiber-coupled quantum cascade laser excitation," Opt. Lett. 37, 4461-4463 (2012).

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