Compact Optical Module of Homodyne Detection

概要

論文の詳細を見る
Homodyne detection is a detection technique that significantly amplifies optical signals. It is useful for the readout of multilayer optical discs, where the signal level is quite low. The improvement of optical disc readout signal quality by homodyne detection has been demonstrated experimentally. However, homodyne detection requires a complicated optical system, which causes large-scale implementation and high cost, which prevents practical use of the technique in optical disc systems. In this report, we demonstrated compact implementation of homodyne detection. We proposed and assembled two types of optical module for homodyne detection. The sizes of the modules were 10\times 30 and 10\times 40 mm2, which were comparable to that of the current optical pickup. Jitter of the attenuated Blu-ray Disc™ recordable (BD-R) readout signals was improved from 15 to 7.8% by applying one of the modules.
2012-08-25