Abstract

A double S-bend lateral offset structure has been proposed for the reduction of length and S-bend loss of 2$\,\times\,$2 two mode interference (TMI) coupler. The coupling characteristics of the proposed structure are compared with those of conventional TMI structures using a simple mathematical model based on sinusoidal modes. It is seen that the longitudinal beat length for the proposed TMI coupler is reduced by 15% of beat length of a conventional TMI coupler whereas the S-bending loss is reduced by ~50% by using lateral offset in the double S-bend structure. The effect of fabrication tolerance on power imbalance for the proposed TMI structure is also compared with other TMI structures. It is seen that the fabrication tolerance for the proposed structure with lateral offset is almost same as that without lateral offset.

© 2011 IEEE

PDF Article

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