Abstract

We present a theoretical model that describes a multisegment oven configuration to compensate for the Gouy phase shift in the tight focusing regime. The model is provided to obtain maximum efficiency of the second-harmonic wave. Numerical simulations are performed based on the experimental setup employing an MgO:sPPLT nonlinear crystal. It is shown by the simulation that the three-segment oven is potentially capable of reaching the highest efficiency by canceling the effect of Gouy phase when the temperature of each segment is so optimized that the phase-matching condition is re-established. It is found that by using a multisegment oven scheme with optimized temperature, the highest attainable second-harmonic generation (SHG) efficiency exceeds about 4.4% at a confocal parameter of 3.32. Moreover, it is shown that for long crystals with large confocal parameter, the only way to attain the maximum efficiency is by using multisegment ovens. The results indicate that when the number of segments is changed from one to nine, the confocal parameter can be varied from 3.90 to 5.85. In the candidate three-segment oven, by applying active control on the temperature of each segment, for a certain combination of segment lengths, 4% improvement in the SHG efficiency is achieved. This results in a relatively large increase in the acceptance temperature bandwidth of the crystal of up to 2 times, reflecting a comparatively large enhancement in the second-harmonic power stability and efficiency.

© 2015 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Thermal dephasing compensation in high-power and high-repetition-rate second-harmonic generation using spillover loss

Saeed Ghavami Sabouri and Alireza Khorsandi
J. Opt. Soc. Am. B 33(8) 1640-1648 (2016)

Engineered aperiodically poled nonlinear crystal for high-power second-harmonic generation

Saeed Ghavami Sabouri and Alireza Khorsandi
J. Opt. Soc. Am. B 33(12) 2493-2501 (2016)

High-power, single-frequency, continuous-wave second-harmonic-generation of ytterbium fiber laser in PPKTP and MgO:sPPLT

S. Chaitanya Kumar, G. K. Samanta, and M. Ebrahim-Zadeh
Opt. Express 17(16) 13711-13726 (2009)

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 (7)

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 (4)

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