Abstract

Experimental details of undamped pulsations are presented for a low pressure, far-infrared (FIR) laser optically pumped by a single-frequency CO2 laser in a standing-wave configuration for both the pumping and the FIR lasing action. Spontaneous pulsing in the single-mode HCOOH FIR laser at 742 μm was observed when the cavity was tuned to the FIR resonance and when the CO2 laser of high intensity was sufficiently detuned from the resonance of the pump transition to excite two distinct velocity groups of molecules to contribute to the FIR gain. Theoretical results, based on studies of a model for a laser with two distinct resonant species forming the gain medium, provide a basis for understanding the origin of these instabilities. The model compares satisfactorily with the observed FIR instabilities including the variations in pulsing frequencies observed experimentally as the CO2 laser is detuned. Additional predictions from the model include details of transitions from cw to pulsing behavior and thresholds for deterministic chaos that may be tested in future experiments.

© 1985 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Analysis of a model of a far-infrared laser

Xiao-Guang Wu and Paul Mandel
J. Opt. Soc. Am. B 3(5) 724-731 (1986)

Observation of instabilities and chaos in optically pumped far-infrared lasers

C. O. Weiss
J. Opt. Soc. Am. B 2(1) 137-140 (1985)

Instabilities and chaos in an infrared laser with saturable absorber: experiments and vibrorotational model

Ferdinando de Tomasi, Daniel Hennequin, Bruno Zambon, and Ennio Arimondo
J. Opt. Soc. Am. B 6(1) 45-57 (1989)

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 (18)

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 (34)

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