Frequency control of a CO(2) laser using stark cell stabilization
Brown, Daniel Morris
MetadataShow full item record
Preliminary studies have been carried out for the frequency and intensity stabilization of the output of a Sylvania Model 941 Carbon Dioxide laser, by feedback control of resonator length. Fluctuations due to discharge current and temperature and flow rate of coolant were studied. Current regulation of the power supply was found to be necessary for intensity stability. Cavity length tuning allowed vibration-rotation line selection, with a strong hysteresis effect. A computer analysis of error signal production for a pyroelectric detector and for a HgCdTe detector indicated that phase sensitive detection of the first harmonic signal component gave the typical frequency discriminant. Operation of a servo loop integrator for the feedback loop has been considered. A suitable Stark Effect absorption cell for feedback signal generation has been constructed, but has not been applied to the laser.
Approved for public release; distribution unlimited
Showing items related by title, author, creator and subject.
Li, T.; Wang, B.; Chang, C.-P.; Zhang, Y. (2003);A conceptual coupled atmosphere-ocean model was constructed to understand the origin of the Indian Ocean Dipole Mode (IODM). In the model various positive and negative air-sea feedback processes were involved. Among them ...
Sengupta, Kishore; Te'eni, Dov (MIS Quarterly, 1993-03);Cognitive feedback in group decision making is information that provides decision makers with a better understanding of their own decision processes and that of the other group members. It appears to be an effective aid ...
Filiz, Caner; Jean-Pierre, Markelly (Monterey, California. Naval Postgraduate School, 2012-03);Employee development is among the most important functions of any organization. Since employees are arguably an organizations most important asset, organizations have an incentive to invest in, direct, and promote the ...