Abstract

Intensity distribution of outgoing beams from a uniform sinusoidal grating is investigated on the basis of first-order perturbation theory by dividing the grating region into short subsections. Intensity distribution of outgoing beams from a linearly tapered sinusoidal grating is also studied by considering it as a chain of uniform gratings with steplike amplitudes and using the results obtained for the uniform grating. The intensity profile of outgoing beams from a uniform grating coupler is theoretically verified to exhibit an extremely asymmetric shape and to differ considerably from the Gaussian shape laser beam usually employed as an incident beam in an input coupler, although this fact has been well recognized by people who have studied gratings. However, the output intensity beam profiles from the linearly tapered grating are found to approach a Gaussian shape similar to the profile of the incident beam.

© 1981 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Symmetric profile beams from waveguides with asymmetric grating couplers

Tahar Touam and S. Iraj Najafi
Appl. Opt. 36(12) 2554-2558 (1997)

Gaussian beams from variable groove depth grating couplers in planar waveguides

Keith A. Bates, Lifeng Li, Ronald L. Roncone, and James J. Burke
Appl. Opt. 32(12) 2112-2116 (1993)

Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams

Shun-Der Wu, Elias N. Glytsis, and Thomas K. Gaylord
Appl. Opt. 44(21) 4435-4446 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (36)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription