An application of phase change optical media for a erasable compact disc(CD) has been studied. As the phase change optical disks have featuring properties; overwritable only by power modulation of a single laser beam and detectable reproducing signals directly by reflectivity changes, it can be said that they intrinsically have high compatibility with commercial read-only CD or write-once CD. Recording the CD format signals means pulse width modulation (PWM) recording at low linear velocity. Accordingly, teardrop shaped distortions of recording marks, which are common problems for heat-mode recording media, should be suppressed.
{"title":"Erasable Compact Disc Using Phase Change Optical Media","authors":"E. Ohno, K. Nishiuchi, N. Yamada, N. Akahira","doi":"10.1364/ods.1991.tua3","DOIUrl":"https://doi.org/10.1364/ods.1991.tua3","url":null,"abstract":"An application of phase change optical media for a erasable compact disc(CD) has been studied. As the phase change optical disks have featuring properties; overwritable only by power modulation of a single laser beam and detectable reproducing signals directly by reflectivity changes, it can be said that they intrinsically have high compatibility with commercial read-only CD or write-once CD. Recording the CD format signals means pulse width modulation (PWM) recording at low linear velocity. Accordingly, teardrop shaped distortions of recording marks, which are common problems for heat-mode recording media, should be suppressed.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"21 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":"122820476","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}
R. Craig, D. Mehuys, D. Nam, E. Zucker, B. Chán, D. Welch
Individually addressable laser arrays can offer the simultaneous writing and/or reading of information with optical data storage media. Within the limits of the optical head, the data rates can be multiplied by the number of emitters in the array. We have fabricated addressable arrays which have demonstrated high power, stable mode behavior, and excellent uniformity of optical properties.
{"title":"High Power Addressable Laser Arrays","authors":"R. Craig, D. Mehuys, D. Nam, E. Zucker, B. Chán, D. Welch","doi":"10.1364/ods.1991.wa3","DOIUrl":"https://doi.org/10.1364/ods.1991.wa3","url":null,"abstract":"Individually addressable laser arrays can offer the simultaneous writing and/or reading of information with optical data storage media. Within the limits of the optical head, the data rates can be multiplied by the number of emitters in the array. We have fabricated addressable arrays which have demonstrated high power, stable mode behavior, and excellent uniformity of optical properties.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","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":"129946851","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}
M. Shimamoto, Koichi Yamada, I. Watanabe, Yoshiki Nakajima, Osamu Itoh, Kunimaro Tanaka
As image data has been widely used, the demand for large capacity exchangeable recording media has been increased. Among various exchangeable recording media optical disk is promising for its small size and fast access speed.
{"title":"On Interchangeability of Optical Disk","authors":"M. Shimamoto, Koichi Yamada, I. Watanabe, Yoshiki Nakajima, Osamu Itoh, Kunimaro Tanaka","doi":"10.1364/ods.1991.wc4","DOIUrl":"https://doi.org/10.1364/ods.1991.wc4","url":null,"abstract":"As image data has been widely used, the demand for large capacity exchangeable recording media has been increased. Among various exchangeable recording media optical disk is promising for its small size and fast access speed.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"4 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":"134230031","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}
Magneto-Optical (MO) disk drives hold some winning cards to fight against Winchester drives: - huge bit densities - removable cartridges. But most analyses conclude that MO disks will overthrow magnetic disks in the field of data storage devices only when they will be competitive on other characteristics such as : - direct overwriting - access times - data transfert rate.
{"title":"Integrated Reading and Writing Magneto Optical Heads A Way to a Multigigabyte Multi-rigid-disk Drive","authors":"S. Renard, S. Valette","doi":"10.1364/ods.1991.tuc1","DOIUrl":"https://doi.org/10.1364/ods.1991.tuc1","url":null,"abstract":"Magneto-Optical (MO) disk drives hold some winning cards to fight against Winchester drives: - huge bit densities - removable cartridges. But most analyses conclude that MO disks will overthrow magnetic disks in the field of data storage devices only when they will be competitive on other characteristics such as : - direct overwriting - access times - data transfert rate.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","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":"133460643","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}
S. Ohara, Chikashi Inokuchi, Tadashige Furutani, T. Ishida, K. Ishibashi, A. Kurahashi, Tornio Yoshida
Optical media based on amorphous and crystal phase change have been studied in several laboratories[1][2]. A WORM (Write Once Read Many times) drive is commercially available today[3]. Regarding PCE (Phase Change Erasable) media, recent works have made advanced progress [4][5]. The optical data memory using PCE media has two big features. One is that it has one pass direct overwriting function. It is expected to improve the performance of the current rewritable optical memory. The another is that it has a high performance of handling both PCE and WORM media intrinsically, so-called a multi-function drive. In this paper, we will discuss how to have realized a multi -function drive and report compatibility test results among PCE and WORM media measured by the drive.
基于非晶和晶体相变的光学介质已经在多个实验室进行了研究。WORM (Write Once Read Many times，写一次读多次)驱动器现在已经商品化了。关于PCE (Phase Change Erasable)介质，最近的工作取得了进展b[4][5]。采用PCE介质的光数据存储器具有两大特点。一是它有一次直接覆盖功能。该方法有望提高现有可重写光存储器的性能。二是它本身具有处理PCE和WORM介质的高性能，即所谓的多功能驱动器。在本文中，我们将讨论如何实现一个多功能驱动器，并报告该驱动器测量的PCE和WORM介质之间的兼容性测试结果。
{"title":"Compatibility test for Phase Change Erasable and WORM media in a Multi-function drive","authors":"S. Ohara, Chikashi Inokuchi, Tadashige Furutani, T. Ishida, K. Ishibashi, A. Kurahashi, Tornio Yoshida","doi":"10.1364/ods.1991.tua5","DOIUrl":"https://doi.org/10.1364/ods.1991.tua5","url":null,"abstract":"Optical media based on amorphous and crystal phase change have been studied in several laboratories[1][2]. A WORM (Write Once Read Many times) drive is commercially available today[3]. Regarding PCE (Phase Change Erasable) media, recent works have made advanced progress [4][5]. The optical data memory using PCE media has two big features. One is that it has one pass direct overwriting function. It is expected to improve the performance of the current rewritable optical memory. The another is that it has a high performance of handling both PCE and WORM media intrinsically, so-called a multi-function drive. In this paper, we will discuss how to have realized a multi -function drive and report compatibility test results among PCE and WORM media measured by the drive.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"63 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":"133963812","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 LD-PD(1) is an oxidation-free, 1.3 µm wavelength InGaAsP laser diode monolithically integrated with a photodetector. A flying optical head(2) with an LD-PD on a slider is expected to be smaller, lighter, and less expensive than the conventional heads. In this paper, we analyze the read/write characteristics, the head/disk interface reliability, and the expected applications of the proposed head.
{"title":"Flying Head Read/Write Characteristics Using a Monolithically Integrated LD-PD at a Wavelength of 1.3 µm","authors":"H. Ukita, H. Nakada, Y. Katagiri","doi":"10.1364/ods.1991.tuc2","DOIUrl":"https://doi.org/10.1364/ods.1991.tuc2","url":null,"abstract":"The LD-PD(1) is an oxidation-free, 1.3 µm wavelength InGaAsP laser diode monolithically integrated with a photodetector. A flying optical head(2) with an LD-PD on a slider is expected to be smaller, lighter, and less expensive than the conventional heads. In this paper, we analyze the read/write characteristics, the head/disk interface reliability, and the expected applications of the proposed head.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"21 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113962790","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}
GE has been developing high performance recording systems for ruggedized and militarized applications, covering spaceborne, airborne, shipboard and mobile applications. Through sponsorship of the Air Force's Rome Air Development Center (RADC), the 14-inch Tactical Optical Disk System (TODS) is currently being designed and built for reconnaisance aircraft applications. These applications require real time data capture and online storage of large image and sensor database files, which must be stored and retreived rapidly. This requirement translates into high performance system specifications for the 14-inch TODS optical disk storage system. Of primary concern is high, continuous data transfer rates and large data storage capacities. Large image files cannot be segmented, thus requiring the system to contain the entire data file on a single media unit, and to stream the file at a very high data transfer rate.
{"title":"A MultiTrack Rewritable Optical Disk Recording System for High Performance Applications: 14-inch TODS","authors":"Joseph L. Cinelli, Taras Kozak","doi":"10.1364/ods.1991.tub2","DOIUrl":"https://doi.org/10.1364/ods.1991.tub2","url":null,"abstract":"GE has been developing high performance recording systems for ruggedized and militarized applications, covering spaceborne, airborne, shipboard and mobile applications. Through sponsorship of the Air Force's Rome Air Development Center (RADC), the 14-inch Tactical Optical Disk System (TODS) is currently being designed and built for reconnaisance aircraft applications. These applications require real time data capture and online storage of large image and sensor database files, which must be stored and retreived rapidly. This requirement translates into high performance system specifications for the 14-inch TODS optical disk storage system. Of primary concern is high, continuous data transfer rates and large data storage capacities. Large image files cannot be segmented, thus requiring the system to contain the entire data file on a single media unit, and to stream the file at a very high data transfer rate.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","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":"121147831","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}
Surface-relief diffractive elements show promise for magneto-optical data storage head applications due to their polarization selectivity, planar geometry, high diffraction efficiency, and manufacturability. In this paper, a rigorous vector coupled-wave model is presented and used in the design and tolerancing of diffractive optical components.
{"title":"Use of Rigorous Vector Coupled-Wave Theory in Design and Tolerancing Studies of Arbitrary Profile Surface-Relief Diffractive Components for Magneto-Optical Heads","authors":"C. Haggans, R. Kostuk","doi":"10.1364/ods.1991.tud4","DOIUrl":"https://doi.org/10.1364/ods.1991.tud4","url":null,"abstract":"Surface-relief diffractive elements show promise for magneto-optical data storage head applications due to their polarization selectivity, planar geometry, high diffraction efficiency, and manufacturability. In this paper, a rigorous vector coupled-wave model is presented and used in the design and tolerancing of diffractive optical components.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"28 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":"134138345","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}
There is considerable interest in exploiting photosensitivity in germanosilicate optical fibres for application in the areas of optical communication and sensors. Hill et al [1] first observed permanent optically-induced changes of the refractive index of optical fibres in 1978. In their experiment coherent radiation at 514.5nm, reflected from the fibre ends, generated a standing wave in the fibre which induced a periodic refractive index change along its length. This formed a high reflectivity Bragg grating in the fibre which has a peak at the wavelength of the incident beam. Since then numerous studies into the grating growth mechanism and photosensitive fibres have been carried out [2],[3]. However, the mechanism which results in the perturbation to the refractive index of the fibre core is not fully understood. The spectral region where the fibre is photosensitive has been found to range from the uv to around 500nm.
{"title":"Optical Data Storage in Photosensitive Fibres","authors":"R. Campbell, R. Kashyap","doi":"10.1364/ods.1991.mf3","DOIUrl":"https://doi.org/10.1364/ods.1991.mf3","url":null,"abstract":"There is considerable interest in exploiting photosensitivity in germanosilicate optical fibres for application in the areas of optical communication and sensors. Hill et al [1] first observed permanent optically-induced changes of the refractive index of optical fibres in 1978. In their experiment coherent radiation at 514.5nm, reflected from the fibre ends, generated a standing wave in the fibre which induced a periodic refractive index change along its length. This formed a high reflectivity Bragg grating in the fibre which has a peak at the wavelength of the incident beam. Since then numerous studies into the grating growth mechanism and photosensitive fibres have been carried out [2],[3]. However, the mechanism which results in the perturbation to the refractive index of the fibre core is not fully understood. The spectral region where the fibre is photosensitive has been found to range from the uv to around 500nm.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","volume":"7 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":"114431090","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}
A Scanning Optical Microscope (SOM) detects variations in the optical reflection of a focussed laser beam from a surface, and therefore the information it gives is directly comparable to the response of an optical disc player/recorder. However, being a microscope, it is not limited to signals along a single line across a surface (as in a recorder), but can provide 2-Dimensional images of local regions of the surface under a variety of optical detection schemes, resolutions and aberrations. It can thereby not only model the optical recorder response, but provide quantitative information on the physical origin of the contrast observed. In this summary we will briefly outline the possible uses of the SOM as a tool in Optical Recording, and provide a few examples of its application.
{"title":"Scanning Optical Microscopy: A Powerful Tool for Studying the Physical and Optical Processes in Optical Recording.","authors":"J. Coombs, A. Holtslag","doi":"10.1364/ods.1991.mb1","DOIUrl":"https://doi.org/10.1364/ods.1991.mb1","url":null,"abstract":"A Scanning Optical Microscope (SOM) detects variations in the optical reflection of a focussed laser beam from a surface, and therefore the information it gives is directly comparable to the response of an optical disc player/recorder. However, being a microscope, it is not limited to signals along a single line across a surface (as in a recorder), but can provide 2-Dimensional images of local regions of the surface under a variety of optical detection schemes, resolutions and aberrations. It can thereby not only model the optical recorder response, but provide quantitative information on the physical origin of the contrast observed. In this summary we will briefly outline the possible uses of the SOM as a tool in Optical Recording, and provide a few examples of its application.","PeriodicalId":408950,"journal":{"name":"Optical Data Storage Topical Meeting","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":"124921833","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：