以體積布拉格光柵作為雷射共振腔反射鏡之橫模行為研究

Study of the transverse mode of lasers using volume Bragg grating as a cavity mirror

廖啟村(Chi-Chun Liao)

指導教授 ： 鍾德元

國立中央大學/理學院/光電科學研究所/碩士(2012年)

摘要

將體積布拉格光柵用於雷射系統中，可以有效窄化雷射的輸出光譜，以及改善雷射輸出的空間模態M2，而體積布拉格光柵的角度選擇性與一般的共振腔反射鏡有極大的差別。本論文以數值模擬的方式，計算以體積布拉格光柵為共振腔反射鏡的雷射系統輸出橫模。並由數值模擬結果，預測以體積布拉格光柵為共振腔反射鏡的雷射系統將有機會輸出環形模態，並成功架設固態雷射系統，驗證環形模態的存在。
且由模擬結果發現，在以體積布拉格光柵為共振腔反射鏡的雷射系統中，若雷射波長小於體積布拉格光柵的繞射中心波長，系統將會發生不同於傳統的模態輸出。

關鍵字

橫模 ； 體積布拉格光柵 ； 共振腔反射鏡

並列摘要

Volume Bragg grating for the laser systems can be effectively narrowing the laser output spectrum, and to improve the spatial beam quality M2 of the laser output. There has the great difference in the angular selectivity between the volume Bragg grating and the general cavity mirror. In this thesis, uses the numerical simulation to calculate the output transverse mode of lasers using volume Bragg grating as a cavity mirror. By the numerical simulation results, predicts that lasers using volume Bragg grating as a cavity mirror, will have the opportunity to output the ring-shaped mode, and successfully set up a solid-state laser system, verify the existence of the ring-shaped mode.
From the simulation results, lasers using volume Bragg grating as a cavity mirror, when the laser wavelength is less than the diffraction central wavelength of volume Bragg grating, the system will output the mode that is different from the traditional Gaussian mode.

並列關鍵字

transverse mode ； cavity mirror ； volume Bragg grating

參考文獻

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