Abstract
The optical diagnostics for a CW iodine laser system are presented. The iodine laser consisted of a supersonic flow gain generator and a unstable ring resonator with a rotation that produced a high quality output without an obscuration. The diagnostics subsystem was designed, assembled, characterized and integrated by a team of fourteen co-workers. The diagnostics measured the average output power, and the forward and reverse mode intensity fluctuations during the one to two second lasing time. Also recorded as a function of time was the far field beam quality, the near field intensity, the near field phase, the polarization state Stokes parameters, and the cavity longitudinal mode beat frequencies. A brief description of the resonator and its expected properties will be presented. This will be followed by a discussion of the requirements for and capabilities of the diagnostics. Included will be data reduction and analysis timeline. Next, detailed descriptions of the beam quality and polarization state measurement diagnostics will be given. Finally, examples of typical diagnostic data will be shown.
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