D-fiber holographic diffraction gratings

Jim D. Freeze; Richard H. Selfridge

doi:10.1117/12.151282

Abstract

Diffraction gratings have been holographically fabricated on the "flat" surface of pre-etched D-fibers. The D-fibers are single mode with cutoff wavelengths of 633, 820, and 1300 nm. The gratings range in periodicity from less than 0.9 to 1.4 μm. Maximum total free-space coupling efficiencies of up to 82% are reported with a grating periodicity of 1.4 μm over a length of about 5 to 7 mm. Guided-mode to free-space coupling is enhanced by reducing the core-to-flat distance of the D-fiber. This distance is controlled by chemically etching the fiber by means of an in situ monitored etching technique. The different etch rates between the cladding and the silica cause a recessed contour in the cladding centered over the core. This recess causes difficulties when patterning submicron photoresist gratings over the core. Photoresist gratings are fabricated holographically by means of a Lloyd's mirror arrangement. Masked etching with hydrofluoric acid writes the gratings into the cladding structure of the fiber. Incorporating diffraction gratings into optical fibers miniaturizes integrated diffraction grating devices and eliminates the need to remove a signal from its fiber environment for processing.

Citation Download Citation

Jim D. Freeze, Jim D. Freeze, Richard H. Selfridge, Richard H. Selfridge, } "D-fiber holographic diffraction gratings," Optical Engineering 32(12), (1 December 1993). https://doi.org/10.1117/12.151282 . Submission:

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $20.00

Non-members: $25.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years