B. Franz and H. Bulow, "Mode group division multiplexing in gradedindex multimode fibers," Bell Labs Tech. J., vol. 18, no. 3, pp. 153-172, Dec. 2013.
M. Lobry et al., "Multimodal plasmonic optical fiber grating aptasensor," Opt. Exp., vol. 28, no. 5, pp. 7539-7551, Feb. 2020.
Y.-G. Nan, D. Kinet, K. Chah, I. Chapalo, C. Caucheteur, and P. Mégret, "Ultra-fast fiber Bragg grating inscription in CYTOP polymer optical fibers using phase mask and 400 nm femtosecond laser," Opt. Exp., vol. 29, no. 16, pp. 25824-25835, Jul. 2021.
D. Vilarinho et al., "Foot plantar pressure monitoring with CYTOP Bragg gratings sensing system," in Proc. 11th Int. Joint Conf. Biomed. Eng. Syst. Technol., 2018, pp. 25-29.
C. Broadway et al., "L-band CYTOP Bragg gratings for ultrasound sensing," Proc. SPIE, vol. 1068109, 2018, pp. 46-54.
T. Erdogan, "Fiber grating spectra," J. Lightw. Technol., vol. 15, no. 8, pp. 1277-1294, Aug. 1997.
Y. Liu, J. Lit, X. Gu, and L.Wei, "Fiber comb filters based on UV-writing Bragg gratings in graded-index multimode fibers," Opt. Exp., vol. 13, no. 21, pp. 8508-8513, 2005.
M. J. Schmid and M. S. Müller, "Measuring Bragg gratings in multimode optical fibers," Opt. Exp., vol. 23, no. 6, pp. 8087-8094, Mar. 2015.
C. Lu and Y.Cui, "FiberBragg grating spectra inmultimode optical fibers," J. Lightw. Technol., vol. 24, no. 1, pp. 598-604, Jan. 2006.
T. Mizunami, T. Djambova, T. Niiho, and S. Gupta, "Bragg gratings in multimode and few-mode optical fibers," J. Lightw. Technol., vol. 18, no. 2, pp. 230-235, Feb. 2000.
Y.-G. Nan, I. Chapalo, K. Chah, X. Hu, and P. Mégret, "Through over-clad inscription of FBG in CYTOP optical fiber using phase mask technique and 400 nm femtosecond pulsed laser," J. Lightw. Technol., vol. 40, no. 9, pp. 3031-3037, May 2022.
A. Ghatak and K. Thyagarajan, "Propagation characteristics of graded index fibers," in Introduction to Fiber Optics. Cambridge, U.K.: Cambridge Univ. Press, 1998, pp. 173-195.
J. Senior, "Optical fiber waveguides," in Optical Fiber Communications: Principles and Practice, 3rd Ed. London, U.K.: Pearson Educ. Limited, 2009, pp. 12-82.
A. W. Snyder and J. D. Love, "Weakly guiding waveguides," in Optical Waveguide Theory. New York, NY, USA: Springer, 1983, pp. 280-300.
F. Mitschke, "Treatment with wave optics," in Fiber Optics. Berlin/Heidelberg, Germany: Springer, 2016, pp. 29-50.
Corning, "Corning 50/125 optical fiber production information," 2001. [Online]. Available: http://www.pierluigidamico.it/FO%2050%20125. pdf
R. Olshansky, "Mode coupling effects in graded-index optical fibers," Appl. Opt., vol. 14, no. 4, pp. 935-945, Apr. 1975.
A. Hallam, "Mode control inmultimode optical fibre and its applications," Ph.D. dissertation, Aston University, Birmingham, U.K., 2007.
A. Ghatak and K. Thyagarajan, I Graded Index Optical Waveguides: A Review. Amsterdam, The Netherlands: Elsevier, 1980.
C. Someda and M. Zcboli, "Cutoff wavelengths of guided modes in optical fibres with square-law core profile," Electron. Lett., vol. 24, no. 11, pp. 602-603, 1975.
K. Okamoto and T. Okoshi, "Analysis ofwave propagation in optical fibers having core with alpha-power refractive-index distribution and uniform cladding," IEEE Trans.Microw. Theory Techn., vol. 24, no. 7, pp. 416-421, Jul. 1976.
T. I. Lukowski and F. P. Kapron, "Parabolic fiber cutoffs: A comparison of theories," J. Opt. Soc. Amer., vol. 67, no. 9, pp. 1185-1187, Sep. 1977.
E. Bianciardi and V. Rizzoli, "Propagation in graded-core fibres: A unified numerical description," Opt. Quantum Electron., vol. 9, no. 2, pp. 121-133, Mar. 1977.
K. Kitayama, S. Seikai, and N.Uchida, "Impulse response prediction based on experimental mode coupling coefficient in a 10-km long graded-index fiber," IEEE J. Quantum Electron., vol. 16, no. 3, pp. 356-362, Mar. 1980.
S. P. Ugale and V. Mishra, "Optimization of fiber Bragg grating length for maximum reflectivity," in Proc. Int. Conf. Commun. Signal Process., 2011, pp. 28-32.
B. E. Pelleg and A. K. Fontecchio, "Modeling light propagation through Bragg reflection gratings with an adapted Monte Carlo method," J. Lightw. Technol., vol. 32, no. 12, pp. 2228-2232, Jun. 2014.
H. Kogelnik, "Theory of optical waveguides," in Guided-Wave Optoelectronics. Berlin/Heidelberg, Germany: Springer, 1988, pp. 7-88.
R. Kashyap, "Theory of fiber Bragg gratings," in Fiber Bragg Gratings. Amsterdam, The Netherlands: Elsevier, 2010, pp. 119-189.
P. Lemaire and R. Atkins, "High pressure H2 loading as a technique for achieving ultrahigh UV photosensitivity and thermal sensitivity in GeO2 doped optical fibres," Electron. Lett., vol. 29, no. 13, 1993, Art. no. 1191.
"The information of the QA6370," 2021. [Online]. Available: https://cdn. tmi.yokogawa.com/1/5720/files/IM735371-01E.pdf
