Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.817769
A. Shirakawa
Noncollinear optical parametric amplification (NOPA) is recently attracting a great deal of attention as a novel method of ultrashort pulse generation. The noncollinear geometry can realize the group-velocity-matching between the signal and idler, which is equivalent to an achromatic phase-matching with the spectral angular dispersion of the idler, and the broadest gain bandwidth is attained. In the paper we present a novel NOPA which has led to the first tunable sub-l0 fs light source. Both concepts of a pulse-front matching (PFM) and idler angular-dispersion compensation are essential to obtain transform-limited (TL) pulses from a NOPA, and sub-9 fs pulses are generated both in the wide ranges of the visible and near-IR (NIR). Extension of this technology to a full-bandwidth operation realizes as short as a 4.7-fs pulse generation, which is the first sub-5 fs light source by other methods than the traditional continuum-compression scheme. The PFM-NOPA is superior in many aspects such as tunability, pulse energy, flexible pulse width and bandwidth, which is believed to be the most useful light source for ultrafast spectroscopy.
{"title":"Sub-9-fs pulse generation tunable in visible (550-700 nm) and near-IR (0.9-1.3 /spl mu/m) by noncollinear phase-matching and pulse-front matching","authors":"A. Shirakawa","doi":"10.1109/CLEOPR.1999.817769","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.817769","url":null,"abstract":"Noncollinear optical parametric amplification (NOPA) is recently attracting a great deal of attention as a novel method of ultrashort pulse generation. The noncollinear geometry can realize the group-velocity-matching between the signal and idler, which is equivalent to an achromatic phase-matching with the spectral angular dispersion of the idler, and the broadest gain bandwidth is attained. In the paper we present a novel NOPA which has led to the first tunable sub-l0 fs light source. Both concepts of a pulse-front matching (PFM) and idler angular-dispersion compensation are essential to obtain transform-limited (TL) pulses from a NOPA, and sub-9 fs pulses are generated both in the wide ranges of the visible and near-IR (NIR). Extension of this technology to a full-bandwidth operation realizes as short as a 4.7-fs pulse generation, which is the first sub-5 fs light source by other methods than the traditional continuum-compression scheme. The PFM-NOPA is superior in many aspects such as tunability, pulse energy, flexible pulse width and bandwidth, which is believed to be the most useful light source for ultrafast spectroscopy.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"26 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132587556","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.811411
S. Ismail, E. Browell, R. Ferrare
The lidar atmospheric sensing experiment (LASE) system was developed at the NASA Langley Research Center to measure atmospheric water vapor, aerosols, and clouds from aircraft. Examples of LASE measurements during field experiments and their application to atmospheric science investigations are presented in this paper. LASE is a compact and highly engineered DIAL system that has demonstrated autonomous operation from a high-altitude aircraft as a precursor to a space-borne DIAL system. The laser system consists of a double-pulsed Ti:sapphire laser that operates in the 815-nm absorption band of water vapor and is pumped by a frequency doubled Nd:YAG laser.
{"title":"LASE measurements of water vapor, aerosol, and clouds for atmospheric science investigations","authors":"S. Ismail, E. Browell, R. Ferrare","doi":"10.1109/CLEOPR.1999.811411","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.811411","url":null,"abstract":"The lidar atmospheric sensing experiment (LASE) system was developed at the NASA Langley Research Center to measure atmospheric water vapor, aerosols, and clouds from aircraft. Examples of LASE measurements during field experiments and their application to atmospheric science investigations are presented in this paper. LASE is a compact and highly engineered DIAL system that has demonstrated autonomous operation from a high-altitude aircraft as a precursor to a space-borne DIAL system. The laser system consists of a double-pulsed Ti:sapphire laser that operates in the 815-nm absorption band of water vapor and is pumped by a frequency doubled Nd:YAG laser.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133506018","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.811517
I. Kakiki, H. Taniguchi, B. Devaraj, H. Inaba
Attractive experimental investigations are currently reported on laser action from optically pumped bulk solution and liquid microdroplets of high-gain dye containing strongly scattering nanoparticles. The mechanism is considered due to multiple light scattering in a strongly scattering and diffusive medium that can trap pump photons as well as emitted photons to provide dispersive random feedback in a small spatial region to exceed the gain over loss for lasing action. Based on the experiment of Lawandy's group, lasing studies of dye-infused animal tissues were performed, because biological tissues have intrinsically scattering, i.e., heterogeneous and continuously disordered properties. However, they merely observed spectral narrowing by scattering-enhanced amplification of spontaneous emission. The paper reports what is to our best knowledge the first experimental result of plant lasers using rice and barley. We could observe the lasing threshold together with spectral narrowing in their outputs.
{"title":"Rice and barley lasers infused with organic dye","authors":"I. Kakiki, H. Taniguchi, B. Devaraj, H. Inaba","doi":"10.1109/CLEOPR.1999.811517","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.811517","url":null,"abstract":"Attractive experimental investigations are currently reported on laser action from optically pumped bulk solution and liquid microdroplets of high-gain dye containing strongly scattering nanoparticles. The mechanism is considered due to multiple light scattering in a strongly scattering and diffusive medium that can trap pump photons as well as emitted photons to provide dispersive random feedback in a small spatial region to exceed the gain over loss for lasing action. Based on the experiment of Lawandy's group, lasing studies of dye-infused animal tissues were performed, because biological tissues have intrinsically scattering, i.e., heterogeneous and continuously disordered properties. However, they merely observed spectral narrowing by scattering-enhanced amplification of spontaneous emission. The paper reports what is to our best knowledge the first experimental result of plant lasers using rice and barley. We could observe the lasing threshold together with spectral narrowing in their outputs.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"521 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131869059","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.817826
M. Suzuki
Transmission capacity for optical undersea cable systems is growing rapidly. The capacity in TPC3, the first optical fiber cable in Pacific Ocean installed in 1989, was 280Mbit/s per fiber pair. The emergence of Erbium doped fiber amplifier (EDFA) paved the way for drastic increase in capacity for undersea optical cables, and large capacity optical amplifier undersea cable systems with 5Gbit/s per fiber pair, such as TPC-SCN and APCN, were constructed in Asia-Pacific region in 1995-1996. Recent 10Gbit/s-based WDM (Wavelength Division Multiplexing) technologies together with new fiber and new amplifier technologies enable us to further increase in capacity up to 160Gbit/s. In this paper, the key technologies for next generation undersea cable systems with 160Gbit/s capacity are reviewed and future prospect towards Tera-bit/s systems is discussed.
{"title":"Long haul and high capacity WDM undersea cable technologies","authors":"M. Suzuki","doi":"10.1109/CLEOPR.1999.817826","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.817826","url":null,"abstract":"Transmission capacity for optical undersea cable systems is growing rapidly. The capacity in TPC3, the first optical fiber cable in Pacific Ocean installed in 1989, was 280Mbit/s per fiber pair. The emergence of Erbium doped fiber amplifier (EDFA) paved the way for drastic increase in capacity for undersea optical cables, and large capacity optical amplifier undersea cable systems with 5Gbit/s per fiber pair, such as TPC-SCN and APCN, were constructed in Asia-Pacific region in 1995-1996. Recent 10Gbit/s-based WDM (Wavelength Division Multiplexing) technologies together with new fiber and new amplifier technologies enable us to further increase in capacity up to 160Gbit/s. In this paper, the key technologies for next generation undersea cable systems with 160Gbit/s capacity are reviewed and future prospect towards Tera-bit/s systems is discussed.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131919015","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.811634
J. I. Kim, S. Kudryashov
Carbon nitride (C/sub x/N/sub y/) thin films are grown at room temperature on Si [100] substrates by reactive cathodic sputtering assisted by pulsed laser ablation of a pure graphite target with/without magnetic field assistance. The magnetic field results in an increase of crystallite size in the films due to bombardment of the Si substrates by energetic carbon and nitrogen species generated during cyclomagnetron motion of electrons in the discharge zone. An increase in nitrogen content is accompanied by a decrease in the content of sp/sup 3/-bonded carbon characteristic of the /spl beta/-C/sub 3/N/sub 4/ structure.
在室温下，通过脉冲激光烧蚀纯石墨靶，在有/无磁场辅助下，在Si[100]衬底上反应阴极溅射生长氮化碳(C/ x/N/ y/)薄膜。由于电子在放电区回旋磁控管运动时产生的含能碳和氮轰击Si衬底，磁场导致薄膜中晶粒尺寸增大。氮含量的增加伴随着/spl β / c /sub 3/N/sub 4/结构特征的sp/sup 3/键碳含量的减少。
{"title":"The influence of a magnetic field on a crystalline structure of carbon nitride thin films deposition","authors":"J. I. Kim, S. Kudryashov","doi":"10.1109/CLEOPR.1999.811634","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.811634","url":null,"abstract":"Carbon nitride (C/sub x/N/sub y/) thin films are grown at room temperature on Si [100] substrates by reactive cathodic sputtering assisted by pulsed laser ablation of a pure graphite target with/without magnetic field assistance. The magnetic field results in an increase of crystallite size in the films due to bombardment of the Si substrates by energetic carbon and nitrogen species generated during cyclomagnetron motion of electrons in the discharge zone. An increase in nitrogen content is accompanied by a decrease in the content of sp/sup 3/-bonded carbon characteristic of the /spl beta/-C/sub 3/N/sub 4/ structure.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132196690","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.811393
T. Fukuda
Single crystal fibers have become the subject of intense study in recent years because of their remarkable characteristics. We have developed a superior growth technique, the micro pulling-down (/spl mu/-PD) method. This method enables us to fabricate new, excellent fibers of oxides, semiconductors and ceramic matrix composites, with high melting temperature and/or incongruent melting composition. Fiber crystals having a small diameter in the range /spl mu/m-mm, grown by the /spl mu/-PD method, exhibit the characteristic features for a wide field of advanced applications. The development of new laser and nonlinear optical crystals also has become a focus of considerable interest because of the progress of optoelectronic technologies. Fiber-form single crystalline materials are of particular interest because of their unique characteristics such as compact size, higher doping concentration, and in some cases novel properties due to their hybrid structure. The /spl mu/-PD method has an important role in this field, and gives us new, excellent optical fiber crystals. The configuration and advantages of the /spl mu/-PD method, and the fabrication of new fiber crystals for optical applications, are described.
{"title":"Fiber crystal growth of laser and SHG materials by the micro pulling down method","authors":"T. Fukuda","doi":"10.1109/CLEOPR.1999.811393","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.811393","url":null,"abstract":"Single crystal fibers have become the subject of intense study in recent years because of their remarkable characteristics. We have developed a superior growth technique, the micro pulling-down (/spl mu/-PD) method. This method enables us to fabricate new, excellent fibers of oxides, semiconductors and ceramic matrix composites, with high melting temperature and/or incongruent melting composition. Fiber crystals having a small diameter in the range /spl mu/m-mm, grown by the /spl mu/-PD method, exhibit the characteristic features for a wide field of advanced applications. The development of new laser and nonlinear optical crystals also has become a focus of considerable interest because of the progress of optoelectronic technologies. Fiber-form single crystalline materials are of particular interest because of their unique characteristics such as compact size, higher doping concentration, and in some cases novel properties due to their hybrid structure. The /spl mu/-PD method has an important role in this field, and gives us new, excellent optical fiber crystals. The configuration and advantages of the /spl mu/-PD method, and the fabrication of new fiber crystals for optical applications, are described.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289588","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.814709
K. Magari
An SOA optical gate array needs to operate at a low carrier density to have a low gain in a fiber-to-fiber lossless operation. It also needs low energy consumption. Thus, an SOA gate array has a different structural design from an SOA optical amplifier. Our group has developed a 4-ch spot-size converter-integrated SOA gate array and its integration with a planar-lightwave-circuit platform. We discuss the inherent problems in array development and how they were overcome.
{"title":"Semiconductor optical amplifier gate array integrated with spot-size converters","authors":"K. Magari","doi":"10.1109/CLEOPR.1999.814709","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.814709","url":null,"abstract":"An SOA optical gate array needs to operate at a low carrier density to have a low gain in a fiber-to-fiber lossless operation. It also needs low energy consumption. Thus, an SOA gate array has a different structural design from an SOA optical amplifier. Our group has developed a 4-ch spot-size converter-integrated SOA gate array and its integration with a planar-lightwave-circuit platform. We discuss the inherent problems in array development and how they were overcome.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134508364","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.817813
E. Zanger, R. Muller, B. Liu, W. Gries
The DeltaConcept is an actively stabilized unidirectional cavity design with a minimum number of optical components-two mirrors and one prism. The symmetrical Brewster-angled beam path through the prism guarantees minimum losses and hence maximum power enhancement and efficiency. The first cw UV laser at 266 nm is accomplished by frequency doubling the 532 nm output of a diode-pumped Nd:YAG laser with the actively stabilized unidirectional ring cavity based on the DeltaConcept. The excellent performance of this 266 nm laser like UV power stability and high beam pointing stability results mainly from the unique features of the DeltaConcept. Also the compact and rugged design of the whole 266 nm laser by hermetic double-sealing of both the DPSSL pump source and the quadrupling stage results in an additional protection of the BBO crystal against environmental influences and reduces the effort in alignment of the whole system. This stable continuous wave UV laser will find versatile applications in both industrial and scientific fields including disc-mastering, wafer inspection, UV photolithography, micromachining, holography as well as absorption and fluorescence spectroscopy.
{"title":"Characterization of a diode-pumped cw high-power all solid-state laser at 266 nm","authors":"E. Zanger, R. Muller, B. Liu, W. Gries","doi":"10.1109/CLEOPR.1999.817813","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.817813","url":null,"abstract":"The DeltaConcept is an actively stabilized unidirectional cavity design with a minimum number of optical components-two mirrors and one prism. The symmetrical Brewster-angled beam path through the prism guarantees minimum losses and hence maximum power enhancement and efficiency. The first cw UV laser at 266 nm is accomplished by frequency doubling the 532 nm output of a diode-pumped Nd:YAG laser with the actively stabilized unidirectional ring cavity based on the DeltaConcept. The excellent performance of this 266 nm laser like UV power stability and high beam pointing stability results mainly from the unique features of the DeltaConcept. Also the compact and rugged design of the whole 266 nm laser by hermetic double-sealing of both the DPSSL pump source and the quadrupling stage results in an additional protection of the BBO crystal against environmental influences and reduces the effort in alignment of the whole system. This stable continuous wave UV laser will find versatile applications in both industrial and scientific fields including disc-mastering, wafer inspection, UV photolithography, micromachining, holography as well as absorption and fluorescence spectroscopy.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130370677","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.814786
Y. Matsunaga, K. Shimizu
In recent years, there has been increasing interest in imaging through dense random media. We cannot see through the medium with considerably high scattering coefficient, even if the light can go through the medium. This is one of the major reasons why the optical trans-body imaging and optical computerised tomography have not been realized yet. We have developed some techniques to suppress the scattering effect in the imaging through mammalian tissues. Here, we report another technique to improve the visibility through scattering random media.
{"title":"Attempt to improve imaging through random media","authors":"Y. Matsunaga, K. Shimizu","doi":"10.1109/CLEOPR.1999.814786","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.814786","url":null,"abstract":"In recent years, there has been increasing interest in imaging through dense random media. We cannot see through the medium with considerably high scattering coefficient, even if the light can go through the medium. This is one of the major reasons why the optical trans-body imaging and optical computerised tomography have not been realized yet. We have developed some techniques to suppress the scattering effect in the imaging through mammalian tissues. Here, we report another technique to improve the visibility through scattering random media.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115491046","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}
Pub Date : 1999-08-30DOI: 10.1109/CLEOPR.1999.817912
Y. Shibata, M. Abo, T. Nagai, O. Uchino
Some kinds of incoherent Doppler lidars using edge filters have been proposed for the wind velocity measurement. Korb et al. (1992) proposed the single edge technique to measure the wind velocity by the intensity change of the light transmitted through the sharp-slope of the etalon. Friedman et al. (1997) proposed the single edge technique that used an iodine vapor cell instead of the etalon. Recently, the double edge technique was proposed by Korb et al. (1998), who used two edges with opposite slopes symmetrically located about the laser frequency and improved the accuracy compared with the single edge technique. In this paper, we propose a new incoherent Doppler lidar using two transmission slopes of one iodine absorption line and the injection seeded Nd:YAG laser which changes the frequency alternately. We produced actually this new lidar and obtained the preliminary result ofthe wind measurement experiment.
提出了几种采用边缘滤波器的非相干多普勒激光雷达用于风速测量。Korb etal .(1992)提出了单边技术，通过通过标准子的陡坡透射光的强度变化来测量风速。Friedman etal .(1997)提出了使用碘蒸气电池代替标准子的单边技术。最近，Korb et al.(1998)提出了双边缘技术，他们使用两条斜率相反的边缘对称地位于激光频率附近，与单边缘技术相比，提高了精度。本文提出了一种新型的非相干多普勒激光雷达，利用一条碘吸收线的两个透射斜率和频率交替变化的注入种子Nd:YAG激光器。我们实际制作了这种新型激光雷达，并取得了测风实验的初步结果。
{"title":"A new incoherent Doppler lidar using an iodine vapor edge filter","authors":"Y. Shibata, M. Abo, T. Nagai, O. Uchino","doi":"10.1109/CLEOPR.1999.817912","DOIUrl":"https://doi.org/10.1109/CLEOPR.1999.817912","url":null,"abstract":"Some kinds of incoherent Doppler lidars using edge filters have been proposed for the wind velocity measurement. Korb et al. (1992) proposed the single edge technique to measure the wind velocity by the intensity change of the light transmitted through the sharp-slope of the etalon. Friedman et al. (1997) proposed the single edge technique that used an iodine vapor cell instead of the etalon. Recently, the double edge technique was proposed by Korb et al. (1998), who used two edges with opposite slopes symmetrically located about the laser frequency and improved the accuracy compared with the single edge technique. In this paper, we propose a new incoherent Doppler lidar using two transmission slopes of one iodine absorption line and the injection seeded Nd:YAG laser which changes the frequency alternately. We produced actually this new lidar and obtained the preliminary result ofthe wind measurement experiment.","PeriodicalId":408728,"journal":{"name":"Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464)","volume":"27 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114224613","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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