Tapered optical fiber grating devices with variable index coatings for modifying guide properties of the fundamental mode

An optical fiber grating device (10) including a length of optical fiber having a predetermined fundamental mode effective guide index and a longitudinally tapered region for accessing a fundamental mode of light. The tapered region has a grating (24) with a predetermined light spectral shaping prop...

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Hauptverfasser: STENTZ, ANDREW JOHN, ESPINDOLA, ROLANDO PATRICIO, WAGENER, JEFFERSON LYNN
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:An optical fiber grating device (10) including a length of optical fiber having a predetermined fundamental mode effective guide index and a longitudinally tapered region for accessing a fundamental mode of light. The tapered region has a grating (24) with a predetermined light spectral shaping property that shapes the light spectrum of the fundamental mode. A coating (26) surrounds the tapered region (18) of the fiber for modifying the fundamental mode effective guide index of the fiber in order to change the spectral shaping property of the grating.