R. Fu, Lingqian Zhang, Guangjun Wang, Zhao-qi Wang, E. Ba, G. Mu, Xinhua Hu
With the development of high-power LD arrays, there is a resurgence of interest in DPSSL. But a practical problem is that the output beams of LD have a large divergent angle, generally θ11 equal to 10° and θ⊥ equal to 40° or so. This caused a high loss of pumping power. Meanwhile one of the main obstruct in LD arrays end-pumped architecture is that the laser beams which emitted from unit bar can’t be focused as a single beam by imaging system, i.e. the light field distribution at the focal plane of the focusing system is inhomogeneous and the laser beam doesn’t match the cavity mode. This restricted the pumped efficiency and 1.06 μm laser beams quality. The coupling methods Currently adopted include: aspheric lens series[1], gradient refractive index lens[2], optical fiber[3] and “close” coupling[4]. But all kinds of these coupling systems have some defeats: low transfer efficiency; bad quality of laser beam and restraining the number of unit bars of LD arrays. Lens duct is a kind of good coupling system[5,6,7], we adopted it in our experiment to improve the total conversion translate efficiency and beam quality.
{"title":"High - Efficiency Laser Diode Arrays Pumped Nd: YAG Laser","authors":"R. Fu, Lingqian Zhang, Guangjun Wang, Zhao-qi Wang, E. Ba, G. Mu, Xinhua Hu","doi":"10.1364/sslma.1997.fa4","DOIUrl":"https://doi.org/10.1364/sslma.1997.fa4","url":null,"abstract":"With the development of high-power LD arrays, there is a resurgence of interest in DPSSL. But a practical problem is that the output beams of LD have a large divergent angle, generally θ11 equal to 10° and θ⊥ equal to 40° or so. This caused a high loss of pumping power. Meanwhile one of the main obstruct in LD arrays end-pumped architecture is that the laser beams which emitted from unit bar can’t be focused as a single beam by imaging system, i.e. the light field distribution at the focal plane of the focusing system is inhomogeneous and the laser beam doesn’t match the cavity mode. This restricted the pumped efficiency and 1.06 μm laser beams quality. The coupling methods Currently adopted include: aspheric lens series[1], gradient refractive index lens[2], optical fiber[3] and “close” coupling[4]. But all kinds of these coupling systems have some defeats: low transfer efficiency; bad quality of laser beam and restraining the number of unit bars of LD arrays. Lens duct is a kind of good coupling system[5,6,7], we adopted it in our experiment to improve the total conversion translate efficiency and beam quality.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131500179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Intracavity semiconductor saturable absorber mirrors (SESAMs) [1,2] provide a versatile and effective tool for simple, reliable, self-starting, passively mode-locked or Q-switched solid-states lasers, extending from Q-switched pulses in the nanosecond and picosecond regime to mode-locked pulses from 10's of picoseconds to sub-10fs. This talk reviews the design requirements of SESAMs for stable pulse generation in both the mode-locked and Q-switched regime. The combination of device structure and material parameters for SESAMs provide sufficient design freedom to choose key paramaters such as recovery time, saturation intensity, and saturation fluence, in a compact structure with low insertion loss. We have been able to demonstrate, for example, passive modelocking (with no Q-switching) using an intracavity saturable absorber in solid-state lasers with long upper state lifetimes (e.g. 1 μm neodymium transitions) [1].
{"title":"Solid-state lasers for ultrashort pulse generation","authors":"U. Keller","doi":"10.1364/sslma.1997.thd1","DOIUrl":"https://doi.org/10.1364/sslma.1997.thd1","url":null,"abstract":"Intracavity semiconductor saturable absorber mirrors (SESAMs) [1,2] provide a versatile and effective tool for simple, reliable, self-starting, passively mode-locked or Q-switched solid-states lasers, extending from Q-switched pulses in the nanosecond and picosecond regime to mode-locked pulses from 10's of picoseconds to sub-10fs. This talk reviews the design requirements of SESAMs for stable pulse generation in both the mode-locked and Q-switched regime. The combination of device structure and material parameters for SESAMs provide sufficient design freedom to choose key paramaters such as recovery time, saturation intensity, and saturation fluence, in a compact structure with low insertion loss. We have been able to demonstrate, for example, passive modelocking (with no Q-switching) using an intracavity saturable absorber in solid-state lasers with long upper state lifetimes (e.g. 1 μm neodymium transitions) [1].","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134414836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Zhen, Wang Shi-Yu, Weng Jian-guo, Cai De-fang, Huang Tao, Chen Liang
Diode laser pumped solid state laser offers high reliability efficiency and compactness. These techniques have been applied to continuous wave Nd:YAG laser system. In this letter we report on the Q switching of a diode laser pumped Nd: YAG and have obtained pulses of 18ns and peak power of 5KW at repetition rates 10KHz. The maximum repetition rate that we observed were 50KHz.
{"title":"Q-Switching of 10W Fiber Coupled Diode Laser Pumped Nd:YAG","authors":"G. Zhen, Wang Shi-Yu, Weng Jian-guo, Cai De-fang, Huang Tao, Chen Liang","doi":"10.1364/sslma.1997.fb3","DOIUrl":"https://doi.org/10.1364/sslma.1997.fb3","url":null,"abstract":"Diode laser pumped solid state laser offers high reliability efficiency and compactness. These techniques have been applied to continuous wave Nd:YAG laser system. In this letter we report on the Q switching of a diode laser pumped Nd: YAG and have obtained pulses of 18ns and peak power of 5KW at repetition rates 10KHz. The maximum repetition rate that we observed were 50KHz.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116384696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The experiment setup of the laser is shown in Fig. 1. The bireffequent effect of KTP crystal, together with the Brewster-plate(B-plate) function in the cavity as a loss modulator. Define δ-phase delay angle, γ-angle between the polarization orientation of the slow ray in KTP crystal and the P-plane polarization direction of the B-plate. P-polarization is the polarization direction along which the loss that a light wave passes through the B-plate is zero. Previous calculation results from many other literatures show that the optimum value of γ is 45°, with the mode selecting ability of the crystal reaching the peak value.
{"title":"Calculation of optimum parameters in single frequency LDP intracavity frequency doubled Nd:YAG laser","authors":"J. Yao, J.B. Yang, W.D. Sheng, Y. Zheng","doi":"10.1364/sslma.1997.tuc2","DOIUrl":"https://doi.org/10.1364/sslma.1997.tuc2","url":null,"abstract":"The experiment setup of the laser is shown in Fig. 1. The bireffequent effect of KTP crystal, together with the Brewster-plate(B-plate) function in the cavity as a loss modulator. Define δ-phase delay angle, γ-angle between the polarization orientation of the slow ray in KTP crystal and the P-plane polarization direction of the B-plate. P-polarization is the polarization direction along which the loss that a light wave passes through the B-plate is zero. Previous calculation results from many other literatures show that the optimum value of γ is 45°, with the mode selecting ability of the crystal reaching the peak value.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125144770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Since emergence of the first laser device — ruby laser, solid state lasers continue to occupy a prominent place among the different kinds of laser devices, which are widely used in industrial, medical, military and scientific fields. The laser materials are the research keystones for development of new solid state lasers. There are two kinds of solid state laser: light-pumped and electrically excited, the latter ones are semiconductor lasers. As the preparation of semiconductor laser materials — semiconductor thin films always ties with laser devices, hence, in this paper we discuss mainly the light-pumped and ion-activated solid state materials, in which the author had long been engaged.
{"title":"Development History of Laser Materials and Their Applications in China","authors":"F. Gan","doi":"10.1364/sslma.1997.tua1","DOIUrl":"https://doi.org/10.1364/sslma.1997.tua1","url":null,"abstract":"Since emergence of the first laser device — ruby laser, solid state lasers continue to occupy a prominent place among the different kinds of laser devices, which are widely used in industrial, medical, military and scientific fields. The laser materials are the research keystones for development of new solid state lasers. There are two kinds of solid state laser: light-pumped and electrically excited, the latter ones are semiconductor lasers. As the preparation of semiconductor laser materials — semiconductor thin films always ties with laser devices, hence, in this paper we discuss mainly the light-pumped and ion-activated solid state materials, in which the author had long been engaged.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128984391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Organic crystals with large second-order nonlinear optical (NLO) susceptibilities are of great interest because of their potential use of optical parametric generation.(1) In recent years second-order cascading effects in organic crystals draw much attention not only in the context of basic understandings of the nonlinear optical processes but also potential applications in optoelectronics.
{"title":"Crystal growth, structural and full optical characterizations of 3-Methyl-4-methoxy-4'-nitrostilben (MMONS)","authors":"H. Hong, C. Yoon, T. Xia, E. V. Van Stryland","doi":"10.1364/sslma.1997.thb2","DOIUrl":"https://doi.org/10.1364/sslma.1997.thb2","url":null,"abstract":"Organic crystals with large second-order nonlinear optical (NLO) susceptibilities are of great interest because of their potential use of optical parametric generation.(1) In recent years second-order cascading effects in organic crystals draw much attention not only in the context of basic understandings of the nonlinear optical processes but also potential applications in optoelectronics.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114602998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Along with extensive application of solid ultraviolet laser, specially the nuclear fusion device go up for request more and more high. For example: large size, high quality, high resist damage and high convesion efficienty. to now, there are some shortcoming of the nonlinear crystals-BBO,LBO,KTP KDP ect, as small size, lowe resist damage and long growth period ect They are not satisfing above request So, it is necessary that research new nonlinear crystals continuously. The new UV NLO crystal-CsLiB6O10 (CLBO) have been reported by Y. Mori et al in 1995 (Japan). The advantages of CLBO crystal are large size, high resist damage, sort growth period and slight hygroscopic and very good NLO properties. We report on growth and the UV, NLO properties and application of CLBO cyrstal and compared with other borate crystals.
{"title":"Study Of New Nonlinear Crystal -CsLiB6O10","authors":"Zhang Xiurong, Zhang shuunxin, Chain P. Yao","doi":"10.1364/sslma.1997.wb4","DOIUrl":"https://doi.org/10.1364/sslma.1997.wb4","url":null,"abstract":"Along with extensive application of solid ultraviolet laser, specially the nuclear fusion device go up for request more and more high. For example: large size, high quality, high resist damage and high convesion efficienty. to now, there are some shortcoming of the nonlinear crystals-BBO,LBO,KTP KDP ect, as small size, lowe resist damage and long growth period ect They are not satisfing above request So, it is necessary that research new nonlinear crystals continuously. The new UV NLO crystal-CsLiB6O10 (CLBO) have been reported by Y. Mori et al in 1995 (Japan). The advantages of CLBO crystal are large size, high resist damage, sort growth period and slight hygroscopic and very good NLO properties. We report on growth and the UV, NLO properties and application of CLBO cyrstal and compared with other borate crystals.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114922817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microchip lasers are small solid-state lasers characterized by short resonator lengths (~1 mm) and monolithic flat-flat cavities. The first feature enables solid-state lasers operating in new performance regimes while the second attribute allows inexpensive fabrication of the devices in robust packages. In the simplest of these devices, cw lasers, the laser is fabricated by polishing a wafer of gain medium with surfaces that are flat and parallel with a thickness of the desired resonator length. Resonator mirrors are deposited on the polished faces to form the cavity and then the wafer is diced. Devices with more functionality are fabricated by using two wafers to form the laser, one of which can be an electro-optic material or a saturable absorber material, that are bonded together. Frequency-modulated (>1.3-GHz modulation bandwidth) and Q-switched lasers (220-ps-long pulses with passive Q-switching) have been demonstrated using these techniques.
{"title":"Microchip lasers and applications*","authors":"J. Zayhowski, A. Sanchez, T. Y. Fan","doi":"10.1364/sslma.1997.fa1","DOIUrl":"https://doi.org/10.1364/sslma.1997.fa1","url":null,"abstract":"Microchip lasers are small solid-state lasers characterized by short resonator lengths (~1 mm) and monolithic flat-flat cavities. The first feature enables solid-state lasers operating in new performance regimes while the second attribute allows inexpensive fabrication of the devices in robust packages. In the simplest of these devices, cw lasers, the laser is fabricated by polishing a wafer of gain medium with surfaces that are flat and parallel with a thickness of the desired resonator length. Resonator mirrors are deposited on the polished faces to form the cavity and then the wafer is diced. Devices with more functionality are fabricated by using two wafers to form the laser, one of which can be an electro-optic material or a saturable absorber material, that are bonded together. Frequency-modulated (>1.3-GHz modulation bandwidth) and Q-switched lasers (220-ps-long pulses with passive Q-switching) have been demonstrated using these techniques.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122624922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bin He, Ping Yan, Keying Wu, Changming Zhao, G. Wei
In many fields such as the inertia controlled fusion (ICF), the stabilization of the laser power sometimes plays an important role in the whole system. We choose the LiNbO3 crystal as the light attenuator to stabilize the laser power. By using the successive approach method, the stabilization of the LD pumped Nd:YLF laser improves from 2~3%/h to less than 0.5%/h.
{"title":"Research on the high stable DPSSL","authors":"Bin He, Ping Yan, Keying Wu, Changming Zhao, G. Wei","doi":"10.1364/sslma.1997.fa3","DOIUrl":"https://doi.org/10.1364/sslma.1997.fa3","url":null,"abstract":"In many fields such as the inertia controlled fusion (ICF), the stabilization of the laser power sometimes plays an important role in the whole system. We choose the LiNbO3 crystal as the light attenuator to stabilize the laser power. By using the successive approach method, the stabilization of the LD pumped Nd:YLF laser improves from 2~3%/h to less than 0.5%/h.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128447446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yujing Huo, Pu Wang, Shufang He, B. Lu, Zibiao Wei
For the first time in the world, we found that there are two frequency-doubled laser beams simultaneously in the same self-frequency-doubled laser with rectilinear resonant cavity. One of the beams is the normal frequency-doubled laser beam propagates along the axis of the cavity, and the other is abnormal frequency-doubled laser beam. They are simultaneously generated in the same nonlinear crystal and are of the same frequency but propagate in two deferent directions orthogonal to each other.
{"title":"A New Kind of Nonlinear Optical Phenomenon","authors":"Yujing Huo, Pu Wang, Shufang He, B. Lu, Zibiao Wei","doi":"10.1364/sslma.1997.wa5","DOIUrl":"https://doi.org/10.1364/sslma.1997.wa5","url":null,"abstract":"For the first time in the world, we found that there are two frequency-doubled laser beams simultaneously in the same self-frequency-doubled laser with rectilinear resonant cavity. One of the beams is the normal frequency-doubled laser beam propagates along the axis of the cavity, and the other is abnormal frequency-doubled laser beam. They are simultaneously generated in the same nonlinear crystal and are of the same frequency but propagate in two deferent directions orthogonal to each other.","PeriodicalId":348889,"journal":{"name":"Solid State Lasers: Materials and Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131549555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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