- 學位論文
共軛成像之全像體積光柵外腔雷射之穩定度探討
Stability Analysis of Image Conjugate volume holographic grating external cavity laser
摘要
本實驗使用cat’s-eye形式之光學共振腔，亦即雷射二極體以及VHG光柵處於外共振腔之兩端，並剛好互為是共軛成像點。此光學形式能增加全像體積光柵的可用回授角度範圍，因而增加共振腔光路的容錯率。因此雷射外腔對光較容易，共振腔對外界擾動亦較不敏感，所以本雷射具有良好的防震功能，從而增進雷射的穩定度。經實際測試，本雷射因震動造成之頻率飄移量小於其他未使用cat’s-eye成像之雷射。此雷射之自由線寬為600 kHz，雷射並且能被穩頻在銣原子之D2躍遷頻率。
並列摘要
This thesis presents an external cavity diode laser with a cat’s-eye optical cavity. In this configuration, laser diode and the VHG are placed on two ends of the cavity which also form an image conjugation pair. This design allows a larger range of feedback angles of the VHG, which makes lasing relatively easy. This laser design is resistant to small mechanical vibrations and appears as a shockproof design. We showed experimentally that frequency jitter of this laser due to mechanical vibration is less than that of an ECDL without a cat’s-eye cavity. Its free-running linewidth is measured as 600 kHz, and it can be frequency stabilized to a D2 transition of rubidium.