Robert Wyman (Gemini Observatory), Robert T. Wyman (Gemini Observatory), Maxime Boccas (Gemini Observatory), Chris Carter (Gemini Observatory), Celine dOrgeville (Gemini Observatory), Kevin White (Gemini Observatory)
Keywords: Adaptive Optics
Abstract:
This is an overview of technical issues, and operational and maintenance activities for the Gemini North Guide Star Laser system that are specific to the laser itself, which currently operates in support of Laser Guide Star Adaptive Optics (LGS AO) science observations.
Discussion will detail various issues with laser pump diode failures, failure analysis and reliability as well as techniques in spectral temperature tuning and laser diode procurements. Wavelength stability has been a major issue for operation of the laser and continuous monitoring of the laser is required to maintain power and wavelength within specification. Current investigation in to the problem will be reviewed along with the methods of managing the issue. The sum frequency generation PPSLT crystal will be discussed with respect to performance, maintenance and future testing plans to commission spare crystals in the laser system should they be needed. Various improvements in software and hardware will be briefly discussed along with an overview of diagnostics tools that are in place or being developed.
Since the completion of science commissioning the operations model we follow to prepare and maintain the laser for LGS AO science observations has allowed for very good uptime. During this time it has been an intensive training for those operating the system and some of the experience will be discussed along with the current laser operations support model.
Date of Conference: September 12-15, 2007
Track: Adaptive Optics