本文關(guān)鍵詞：高精細(xì)度光學(xué)參考腔的自主化研制　出處：《物理學(xué)報》2017年08期 　論文類型：期刊論文

  更多相關(guān)文章： 超穩(wěn)腔 超低膨脹系數(shù) 精細(xì)度 光鐘

【摘要】：高精細(xì)度超穩(wěn)光學(xué)參考腔是獲得超窄線寬激光的核心部件.本文報道了面向空間應(yīng)用的高精細(xì)度球形超穩(wěn)光學(xué)參考腔自主化研制及其初步測試結(jié)果.設(shè)計球形腔體直徑為80 mm,腔長78 mm,采用平-凹腔鏡結(jié)構(gòu),凹鏡曲率半徑為0.5 m.使用有限元方法計算了該參考腔的震動敏感度,最佳支撐位置的震動敏感度小于1×10~(-10)/g.采用超光滑表面三級拋光技術(shù)實現(xiàn)光學(xué)表面粗糙度小于0.4 nm(rms)的超精密加工,采用雙離子束濺射法實現(xiàn)工作波長反射率大于99.999%、損耗小于4 ppm腔鏡鍍膜,干式光膠方法鍵合腔體和腔鏡.利用掃腔線寬法和腔衰蕩法對參考腔的線寬和精細(xì)度進行了測量,結(jié)果表明該參考腔的精細(xì)度約為195000,線寬為9.8 kHz.將698 nm半導(dǎo)體激光器鎖定到該參考腔上測得其損耗5 ppm.與實驗室進口同類型參考腔相比較,主要性能指標(biāo)與其相當(dāng).
[Abstract]:The high fineness ultrastable optical reference cavity is the core part of the ultra-narrow linewidth laser. This paper reports the autonomous development and preliminary test results of the high-precision spherical ultra-stable optical reference cavity for space applications. Body diameter is 80. Mm. The cavity length is 78 mm, the mirror curvature radius is 0.5 m. The vibration sensitivity of the reference cavity is calculated by finite element method. The vibration sensitivity of the best supporting position is less than 1 脳 10 ~ (-10) / g. The ultra-precision machining of optical surface roughness less than 0.4 nm / s is realized by using the super-smooth surface three-stage polishing technology. The working wavelength reflectivity is greater than 99.999 and the loss is less than 4 ppm mirror coating by dual ion beam sputtering. The cavity and mirror are bonded by dry gumming method. The linewidth and fineness of the reference cavity are measured by scanning cavity linewidth method and cavity ring-down method. The results show that the precision of the reference cavity is about 195000. The linewidth is 9.8 kHz. The loss of 698 nm semiconductor laser is measured at 5 ppm by locking it to the reference cavity. Compared with the same type of reference cavity imported in the laboratory, the main performance indexes are equivalent.
【作者單位】： 中國科學(xué)院大學(xué);中國科學(xué)院國家授時中心時間頻率基準(zhǔn)實驗室;中航工業(yè)西安飛行自動控制研究所;
【基金】：國家重大科研儀器設(shè)備研制專項(批準(zhǔn)號:61127901) 國家自然科學(xué)基金(批準(zhǔn)號:11273024,61025023);國家自然科學(xué)基金青年科學(xué)基金(批準(zhǔn)號:11403031)資助的課題~~
【分類號】：TN24
【正文快照】： 度,式中w為腔內(nèi)激光場的共振頻率,L為腔長,6L1引言 和^分別為機械震動、熱、聲音等外部環(huán)境及腔鏡布朗噪聲^251引起的腔長變化量和對應(yīng)的腔共近年來,基于超低膨脹系數(shù)(ultra-low expan- 振頻率的變化量.實際應(yīng)用中的超穩(wěn)腔體通常采用sion,ULE)材料的高精細(xì)度(通常大于100000)

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