Inline fiber optic power sensor featuring a variable tap ratio based on a tightly focused femtosecond laser inscription.
Opt Express
; 26(12): 14972-14981, 2018 Jun 11.
Article
em En
| MEDLINE
| ID: mdl-30114801
ABSTRACT
We propose and demonstrate an inline fiber optic power sensor (IFPS) resorting to an embedded waveguide tap, which is formed to traverse across the cladding and core of a standard single-mode fiber. The tap was produced via a single-step inscription based on the femtosecond laser direct-writing method. A tightly focused pulsed laser beam has been particularly exploited to suppress the elongation along the laser propagation direction, thereby improving the cross-sectional symmetry of the created tap waveguide. The fabricated fiber optic tap has been stably combined with a photodiode via a compact package. The achieved tap ratio could be tuned from 1.0% to 5.9% at the wavelength of 1550 nm by adjusting the applied laser power, while the induced excess loss was kept below 0.6 dB. The proposed IFPS will be highly suitable for real-time power monitoring in a variety of applications, including optical communication networks and systems.
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Coleções:
01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2018
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Article