公开(公告)号：US20150103855A1

公开(公告)日：2015-04-16

申请号：US13470081

申请日：2012-05-11

Applicant: Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

Inventor： Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

IPC: H01S3/06 ,  C30B29/32 ,  C30B19/12

CPC classification number: H01S3/0602 ,  C30B19/12 ,  C30B29/32 ,  H01S3/0408 ,  H01S3/0604 ,  H01S3/0612 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/1675

Abstract: A laser gain element including an undoped layer of a monoclinic double tungstate (MDT) crystal, and a method of forming a laser gain element are provided. The laser gain element includes a layer of doped MDT crystal adjacent to the undoped layer, the doped MDT layer including a pre-selected concentration of rare earth ions. The layer of doped MDT crystal has an absorption peak at a first wavelength and an emission peak at a second wavelength longer than the first wavelength; and the layer of doped MDT crystal has a fluorescence emission with a weighted average at a third wavelength shorter than the first wavelength. A laser resonator cavity formed with a plurality of composite gain elements as above is also provided.

Abstract translation: 提供了包括单斜晶双晶钨酸盐（MDT）晶体的未掺杂层的激光增益元件以及形成激光增益元件的方法。 激光增益元件包括与未掺杂层相邻的掺杂MDT晶体层，掺杂的MDT层包括预先选择的稀土离子浓度。 掺杂的MDT晶体层在第一波长处具有吸收峰，并且在比第一波长长的第二波长处具有发射峰; 并且掺杂的MDT晶体层具有在比第一波长短的第三波长处的加权平均的荧光发射。 还提供了如上所述形成有多个复合增益元件的激光谐振腔。

公开(公告)号：US09178329B2

公开(公告)日：2015-11-03

申请号：US13470081

申请日：2012-05-11

Applicant: Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

Inventor： Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

IPC: H01S3/04 ,  H01S3/06 ,  C30B19/12 ,  C30B29/32 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16

CPC classification number: H01S3/0602 ,  C30B19/12 ,  C30B29/32 ,  H01S3/0408 ,  H01S3/0604 ,  H01S3/0612 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/1675

Abstract: A laser gain element including an undoped layer of a monoclinic double tungstate (MDT) crystal, and a method of forming a laser gain element are provided. The laser gain element includes a layer of doped MDT crystal adjacent to the undoped layer, the doped MDT layer including a pre-selected concentration of rare earth ions. The layer of doped MDT crystal has an absorption peak at a first wavelength and an emission peak at a second wavelength longer than the first wavelength; and the layer of doped MDT crystal has a fluorescence emission with a weighted average at a third wavelength shorter than the first wavelength. A laser resonator cavity formed with a plurality of composite gain elements as above is also provided.

Abstract translation: 提供了包括单斜晶双晶钨酸盐（MDT）晶体的未掺杂层的激光增益元件以及形成激光增益元件的方法。 激光增益元件包括与未掺杂层相邻的掺杂MDT晶体层，掺杂的MDT层包括预先选择的稀土离子浓度。 掺杂的MDT晶体层在第一波长处具有吸收峰，并且在比第一波长长的第二波长处具有发射峰; 并且掺杂的MDT晶体层具有在比第一波长短的第三波长处的加权平均的荧光发射。 还提供了如上所述形成有多个复合增益元件的激光谐振腔。

公开(公告)号：US5847851A

公开(公告)日：1998-12-08

申请号：US813016

申请日：1997-03-06

Applicant: Barry A. Wechsler ,  Marvin B. Klein ,  Robert N. Schwartz ,  Gerald D. Bacher

Inventor： Barry A. Wechsler ,  Marvin B. Klein ,  Robert N. Schwartz ,  Gerald D. Bacher

IPC: G03H1/02 ,  G03H1/04

CPC classification number: G03H1/02 ,  G03H2001/026 ,  G03H2001/0268

Abstract: A new photorefractive material comprises BaTiO.sub.3 double-doped with two dopant species, both of which have at least two valence states, with one of the dopant species (e.g., cerium) having an ionization level that is near the middle of the barium titanate bandgap and the other dopant species (e.g., rhodium) having an ionization level that is closer to the valence band edge of barium titanate, such that both dopant species are sensitive to visible light, but only one dopant species (the one closer to the valence band edge) is sensitive to infrared radiation. The double-doped BaTiO.sub.3 provides a unique combination of photorefractive properties, thereby improving its performance as a holographic storage medium. The double-doped barium titanate crystal is employed as a holographic recording element. The double-doped barium titanate crystal has a dark storage time at room temperature of several years or more and may be nondestructively read out at an infrared wavelength. Recording information on the double-doped barium titanate crystal is done by first sensitizing the double-doped barium titanate crystal with a substantially uniform beam of radiation at one wavelength and then either simultaneously or subsequently storing information in the barium titanate crystal with an incident recording beam that has a wavelength that is longer than that of the sensitizing beam. Nondestructive read-out is accomplished using only the second (writing) beam.

Abstract translation: 新的光折变材料包括双掺杂两种掺杂物质的BaTiO 3，两种掺杂物质都具有至少两个价态，其中一种掺杂物质（例如，铈）具有接近钛酸钡带隙中间的电离水平， 具有更接近钛酸钡的价带边缘的电离水平的其它掺杂物质（例如，铑），使得两种掺杂剂物质对可见光敏感，但仅一种掺杂剂物质（更接近价带边缘 ）对红外辐射敏感。 双掺杂BaTiO3提供光折射性质的独特组合，从而提高其作为全息存储介质的性能。 双掺杂钛酸钡晶体用作全息记录元件。 双掺杂钛酸钡晶体在室温下几十年以上的暗存储时间可以在红外波长下非破坏性地读出。 通过首先使具有一个波长的基本上均匀的辐射束的双掺杂钛酸钡晶体敏化，然后同时或随后在具有入射记录光束的钛酸钡晶体中存储信息，来进行双掺杂钛酸钡晶体的记录信息 其具有比感光束的波长更长的波长。 非破坏性读取仅使用第二（写入）光束实现。