High Resolution Quadrant Detector Based Tip-tilt Sensor for Adaptive Optics
A high resolution Quadrant Detector (QD) based tip-tilt sensor for adaptive optics system is tested with a 4 mm laser beam. The laser beam is made to displace by a nano-positioning stage with 30 nm resolution. The sensor is found to respond at the displacement (min.) of 1 μm. The corresponding error signal is found to be 4 mV. The sensor is also tested for minimum power requirement with corresponding bandwidth.
KeywordsQuadrant detector Tip-tilt sensor Adaptive optics system
The authors wish to acknowledge Dr. A. K. Gupta, Director IRDE for encouraging, pursuing and permitting to publish the work. Dr. S. S. Negi, Mr. Durga Singh and Dr. Ajay Kumar are also acknowledged for encouragement and members of adaptive optics group for cooperation. Awakash Dixit is thankful to the IRDE, Dehradun-India for the award of Research Fellowship.