Abstract

The problem of transverse-mode matching between the lowest-loss mode of a confocal unstable resonator and a Gaussian beam, which is injected into the resonator through a coupling hole in its back mirror, is analyzed. It is found that in resonators having equivalent Fresnel number >0.5, there is a value of the coupling hole diameter for which a mode transition occurs. Below this value the coupling coefficient between the mode and the injected signal increases with the hole diameter. The optimal coupling hole diameter for injection locking lies somewhat below the transition value, where the low-order mode is still dominant and the coupling coefficient is high (∼0.25–0.30). The power loss through the coupling hole is negligible (∼2%) compared to the output coupling, which is ∼50–70%.

© 1981 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Inherently injected unstable resonators

Thomas R. Ferguson
Appl. Opt. 25(4) 581-584 (1986)

Time-dependent oscillations in a cw chemical laser unstable resonator

Lee H. Sentman, Munir H. Nayfeh, Steven W. Townsend, Kevin King, Gus Tsioulos, and Jay Bichanich
Appl. Opt. 24(21) 3598-3609 (1985)

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 (4)

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

Tables (1)

You do not have subscription access to this journal. Article tables 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 (6)

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