本文關(guān)鍵詞： 摻鐿正硅酸鹽晶體 全固態(tài)超短脈沖激光器 雙波長(zhǎng)同步鎖模 同步泵浦的飛秒光參量振蕩器 高重頻運(yùn)轉(zhuǎn)　出處：《西安電子科技大學(xué)》2016年博士論文　論文類型：學(xué)位論文

【摘要】：超短脈沖激光在科學(xué)前沿、先進(jìn)制造、微納加工、生物醫(yī)療、寬帶通信以及軍事等眾多領(lǐng)域有著廣泛的應(yīng)用。針對(duì)不同的實(shí)際應(yīng)用對(duì)不同波長(zhǎng)的超短脈沖激光的需求,本文重點(diǎn)開(kāi)展了可見(jiàn)光-近紅外波段新型超快光源包括采用新型超快激光介質(zhì)(摻鐿正硅酸鹽晶體)的全固態(tài)超短脈沖激光器以及同步泵浦的高功率飛秒光參量振蕩器的實(shí)驗(yàn)研究。本人在博士期間的主要工作包括以下內(nèi)容：1.針對(duì)兩種晶體具有多峰的發(fā)射光譜特性,上首次實(shí)現(xiàn)了Yb:YSO/Yb:LSO振蕩器的雙波長(zhǎng)同步鎖模運(yùn)轉(zhuǎn)。采用3 mm長(zhǎng)、摻雜5 at.%Yb3+的Yb:YSO晶體,同時(shí)獲得了中心波長(zhǎng)1059.2 nm和1081.2nm的雙波長(zhǎng)鎖模脈沖,平均功率為164 mW。利用兩個(gè)波長(zhǎng)脈沖在時(shí)域上的拍頻,產(chǎn)生了重頻為1.4 THz、脈寬為169 fs的脈沖序列；利用3 nm長(zhǎng)、摻雜5 at.%Yb34的Yb:LSO晶體,也獲得了中心波長(zhǎng)1060.3 nm和1084.2 nm的雙波長(zhǎng)同步鎖模脈沖,得到了225 mW平均功率,兩個(gè)不同波長(zhǎng)的脈沖拍頻產(chǎn)生的脈沖序列的重復(fù)頻率和脈寬分別是0.85 THz和590 fs。此外,利用全正色散腔型結(jié)構(gòu),我們也首次觀察到了Yb:YSO/Yb:LSO振蕩器的耗散孤子鎖模運(yùn)轉(zhuǎn)。2.首次實(shí)現(xiàn)了Yb:LYSO、Yb:GSO和Yb:LSO振蕩器的飛秒克爾透鏡鎖模運(yùn)轉(zhuǎn)。通過(guò)合理的色散補(bǔ)償,利用3 mm長(zhǎng)、5 at.%摻雜的Yb:LYSO、Yb:GSO和Yb:LSO晶體,分別實(shí)現(xiàn)了61 fs、72fs和54fs的超短脈沖輸出,比之前報(bào)道的SESAM被動(dòng)鎖模結(jié)果相應(yīng)的縮短了10、5、5倍,實(shí)驗(yàn)結(jié)果證明了摻鐿正硅酸鹽晶體在超短脈沖產(chǎn)生方面巨大的潛力。此外,基于SESAM被動(dòng)鎖模的Yb:LYSO振蕩器,我們分別在1035 nm和1042 nm中心波長(zhǎng)獲得了3W平均功率的穩(wěn)定鎖模脈沖,相應(yīng)的脈沖寬度為297 fs和214 fs。亞百飛秒脈沖的產(chǎn)生以及穩(wěn)定的高功率鎖模運(yùn)轉(zhuǎn)證明摻鐿正硅酸鹽晶體是一種同時(shí)兼?zhèn)涓吖β屎驼}寬輸出能力的優(yōu)質(zhì)超快激光介質(zhì)。3.利用自建的高功率SESAM鎖模Yb:LYSO振蕩器作為泵浦源,在國(guó)內(nèi)首次實(shí)現(xiàn)了Yb全固態(tài)激光器泵浦的飛秒MgO:PPLN-OPO,獲得了波長(zhǎng)哎1428 nm-1763 nm范圍連續(xù)可調(diào)諧的信號(hào)光脈沖,進(jìn)一步通過(guò)腔內(nèi)倍頻,將近紅外飛秒脈沖波長(zhǎng)拓展到了768-874nm波段。4.利用2.5nm長(zhǎng)的LBO晶體,對(duì)商用的Yb:KGW飛秒振蕩器進(jìn)行倍頻得到了平均功率4.1 W的高光束質(zhì)量飛秒綠光,倍頻效率達(dá)57.5%。并首次實(shí)現(xiàn)了飛秒綠光泵浦的BIBO-OPO,得到了波長(zhǎng)在660-1057 nm范圍連續(xù)可調(diào)諧的可見(jiàn)光-近紅外信號(hào)光脈沖,最大輸出功率達(dá)1.1 W。經(jīng)過(guò)腔外壓縮后,信號(hào)光最窄脈寬為71 fs。同時(shí)我們還得到1150-1900 nm波長(zhǎng)范圍的空閑光脈沖,最大輸出功率為414 mW,其相應(yīng)的脈沖寬度在94-223 fs之間。5.利用飛秒綠光泵浦的LBO-OPO,得到了波長(zhǎng)在660-1030 nm范圍連續(xù)可調(diào)的信號(hào)光。信號(hào)光的最大輸出功率達(dá)1.9 W,對(duì)應(yīng)52.7%的光光轉(zhuǎn)換效率,是迄今國(guó)際上同類研究所見(jiàn)報(bào)道的最高效率。6.首次利用諧頻泵浦方式實(shí)現(xiàn)了高重頻的綠光泵浦飛秒OPO運(yùn)行。通過(guò)設(shè)計(jì)緊湊的環(huán)形腔結(jié)構(gòu),以飛秒綠光作為泵浦源,實(shí)現(xiàn)了755 MHz重復(fù)頻率的飛秒BIBO-OPO運(yùn)轉(zhuǎn),得到了平均功率為581 mW、脈沖寬度為166 fs的712 nm信號(hào)光。7.建成迄今國(guó)際上最高重頻的飛秒OPO。采用線性腔結(jié)構(gòu),以高功率的Yb:KGW振蕩器為泵浦源,得到了從7.7GHz-37.3GHz不同重復(fù)頻率的飛秒MgO:PPLN-OPO運(yùn)轉(zhuǎn),其信號(hào)光波長(zhǎng)為通信波段的1515nm。其中37.3 GHz為目前己知的飛秒OPO的最高運(yùn)轉(zhuǎn)重復(fù)頻率,此時(shí)的信號(hào)光輸出功率為90mW,脈沖寬度為163 fs。
[Abstract]:Ultrashort pulse laser advanced at the forefront of science, manufacturing, biomedical, micro nano processing, broadband communication and military and other fields has been widely used. According to the different applications of ultrashort pulse laser with different wavelength requirements, this thesis focuses on the visible light and near infrared band light source includes a novel ultrafast using novel ultrafast laser medium (Yb3 + - doped silicate crystal is) solid-state ultrashort pulse laser and experimental study on high power femtosecond optical parametric oscillator synchronous pump. I work in during the doctoral period includes the following contents: 1. according to the emission spectrum of the two crystals have many peaks, for the first time to achieve a dual wavelength mode-locked oscillator synchronous Yb:YSO/Yb:LSO operation. By 3 mm long, Yb:YSO crystal doped with 5 at.%Yb3+, and obtain the center wavelength of 1059.2 nm and dual wavelength mode-locked pulses of 1081.2nm, average power For 164 mW. using two wavelength pulse in the time domain of the beat frequency, the frequency is 1.4 THz, pulse width is 169 FS sequence; using 3 nm long, Yb:LSO crystal doped with 5 at.%Yb34, also received a dual wavelength center wavelength of 1060.3 nm and 1084.2 nm synchronous mode-locked pulse, 225 mW the average power is obtained, two pulse sequence of beat frequency pulse generated by different wavelength repetition frequency and pulse width were 0.85 THz and 590 fs. in addition, use of all normal dispersion cavity type structure, we first observed the dissipative soliton mode-locked oscillator Yb:YSO/Yb:LSO.2. first Yb:LYSO, Yb:GSO and femtosecond Kerr lens Yb:LSO oscillator mode locking operation. Through the reasonable use of dispersion compensation, 3 mm long, 5 at.% doped Yb:LYSO, Yb:GSO and Yb:LSO crystals, there are 61 FS, 72fs and 54fs ultrashort pulse output, than previously reported passively mode-locked SESAM node If the corresponding shortened 10,5,5 times, experimental results show that the doped silicate crystals are produced great potential in ultrashort pulse. In addition, the Yb:LYSO oscillator based on SESAM passive mode locking, we are at 1035 nm and 1042 nm wavelength was 3W the average power of the pulses, the pulse width corresponding to 297 FS and 214 fs. sub hundred femtosecond pulse generation and stable high power mode-locked Yb3 + - doped silicate crystal is that is a high power quality SESAM ultrafast laser medium.3. a combination of both high power and narrow pulse width output capacity by using self mode-locked Yb:LYSO oscillator as the pump source, for the first time in China to achieve femtosecond MgO:PPLN-OPO Yb laser diode pumped solid-state laser, the signal wavelength is obtained 1428 nm-1763 nm well range tunable optical pulse, further by intracavity frequency doubling, near infrared femtosecond pulse wavelength extension To the development of 768-874nm band.4. by 2.5nm LBO long Yb:KGW crystal, the frequency of commercial femtosecond oscillator obtained high beam quality femtosecond laser with average power of 4.1 W green light, the frequency doubling efficiency reached 57.5%. and the first to achieve the green femtosecond pumped BIBO-OPO, the wavelength tunable continuous in the 660-1057 nm range of visible and near infrared the signal pulse, the maximum output power of 1.1 W. after extracavity compression, signal light with the pulse width of 71 fs. at the same time, we also get the 1150-1900 nm wavelength range of free light pulse, maximum output power is 414 mW, the pulse width and the corresponding in 94-223 between FS and.5. using femtosecond pump power of LBO-OPO, the the signal wavelength can be continuously adjusted in the range of 660-1030 nm. The maximum output power of the signal light is 1.9 W, corresponding to the 52.7% optical conversion efficiency, is so far the international similar Research Institute reported the highest The pump power of femtosecond OPO efficiency by.6. for the first time harmonic pump realizes high repetition frequency. Through ring cavity structure design is compact, with femtosecond green as the pump source, the femtosecond BIBO-OPO repetition rate of 755 MHz operation, the average power is 581 mW, the pulse width of 712 nm signal light.7. 166 FS built so far international highest repetition frequency femtosecond OPO. using linear cavity structure, with high power Yb:KGW oscillator as pump source, has been running from MgO:PPLN-OPO 7.7GHz-37.3GHz femtosecond laser with different repetition frequency, the signal wavelength for the communication band 1515nm. which is currently running 37.3 GHz highest known femtosecond OPO repetition frequency at the output signal power is 90mW, the pulse width of 163 fs.

【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN248;TN752

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