Optical characterization of femtosecond laser induced active channel waveguides in lithium fluoride crystals

Journal Article · Tue Jan 14 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4861636· OSTI ID:22271236

Chiamenti, I.; Bonfigli, F.; Montereali, R. M. ^[1]; Gomes, A. S. L. ^[2]; Michelotti, F. ^[3]

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1. ENEA C.R. Frascati, Photonics Micro and Nanostructures Laboratory, V. E. Fermi, 45, 00044 Frascati (RM) (Italy)
2. Universidade Federal de Pernambuco, Department of Physics, 50740-560 Recife (Brazil)
3. Universitá degli Studi di Roma “La Sapienza,” Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Via A. Scarpa, 16, 00161, Rome (Italy)

We successfully realized broad-band light-emitting color center waveguides buried in LiF crystals by using femtosecond laser pulses. The characterization of the waveguides was performed by optical microscopy, photoluminescence spectra, loss measurements and near-field profiling. The experimental results show that the direct-writing fabrication process induces low-index contrast active channel waveguides: their wavelength-dependent refractive index changes, estimated from 10{sup −3} to 10{sup −4} depending on the writing conditions, allow supporting few modes at visible and near-infrared wavelengths.

• OSTI ID: 22271236
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COLOR CENTERS
CRYSTALS
EMISSION SPECTRA
FABRICATION
LASER RADIATION
LASERS
LITHIUM FLUORIDES
NEAR INFRARED RADIATION
OPTICAL MICROSCOPY
PHOTOLUMINESCENCE
REFRACTIVE INDEX
VISIBLE RADIATION
WAVEGUIDES