-
公开(公告)号：US07386021B2
公开(公告)日：2008-06-10
申请号：US11437791
申请日：2006-05-22
Applicant: Raman Kashyap
Inventor： Raman Kashyap
IPC: H01S3/04
CPC classification number: G02F1/0147 , G02F1/353 , G02F1/3775 , G02F2201/307 , H01S5/0092 , H01S5/02248 , H01S5/02407 , H01S5/02438 , H01S5/147
Abstract: In a first broad aspect, the invention provides a light source. The light source includes a semiconductor laser for emitting laser light at a first frequency. The light source also includes an optical fibre that includes a fibre Bragg grating. The fibre Bragg grating is optically coupled to the semiconductor laser for receiving the laser light, reflecting a reflected portion of the laser light towards the laser and allowing the transmitted portion of the laser light to pass through the fibre Bragg grating. The fibre Bragg grating has a temperature-dependant reflection spectrum. A frequency converting optical element is optically coupled to the fibre Bragg grating for receiving the transmitted portion of the laser light and converting at least a fraction of the transmitted portion of the laser light into a converted light having a second frequency different from the first frequency. An output port is optically coupled to the frequency converting optical element for outputting the converted light. A temperature controller is thermally coupled to the fibre Bragg grating for modulating a temperature of the fibre Bragg grating so as to modulate the reflection spectrum.
Abstract translation: 在第一个广泛的方面，本发明提供一种光源。 光源包括用于以第一频率发射激光的半导体激光器。 光源还包括包括光纤布拉格光栅的光纤。 光纤布拉格光栅光学耦合到半导体激光器以接收激光，将激光的反射部分反射向激光器并允许透射的部分激光通过光纤布拉格光栅。 光纤布拉格光栅具有温度依赖反射光谱。 频率转换光学元件光学耦合到光纤布拉格光栅，用于接收激光的透射部分，并将激光的透射部分的至少一部分转换为具有与第一频率不同的第二频率的转换光。 输出端口光耦合到变频光学元件，用于输出转换的光。 温度控制器热耦合到光纤布拉格光栅，用于调制光纤布拉格光栅的温度，以便调制反射光谱。
-
公开(公告)号：US20070064756A1
公开(公告)日：2007-03-22
申请号：US11437791
申请日：2006-05-22
Applicant: Raman Kashyap
Inventor： Raman Kashyap
IPC: H01S5/00
CPC classification number: G02F1/0147 , G02F1/353 , G02F1/3775 , G02F2201/307 , H01S5/0092 , H01S5/02248 , H01S5/02407 , H01S5/02438 , H01S5/147
Abstract: In a first broad aspect, the invention provides a light source. The light source includes a semiconductor laser for emitting laser light at a first frequency. The light source also includes an optical fibre that includes a fibre Bragg grating. The fibre Bragg grating is optically coupled to the semiconductor laser for receiving the laser light, reflecting a reflected portion of the laser light towards the laser and allowing the transmitted portion of the laser light to pass through the fibre Bragg grating. The fibre Bragg grating has a temperature-dependant reflection spectrum. A frequency converting optical element is optically coupled to the fibre Bragg grating for receiving the transmitted portion of the laser light and converting at least a fraction of the transmitted portion of the laser light into a converted light having a second frequency different from the first frequency. An output port is optically coupled to the frequency converting optical element for outputting the converted light. A temperature controller is thermally coupled to the fibre Bragg grating for modulating a temperature of the fibre Bragg grating so as to modulate the reflection spectrum.
Abstract translation: 在第一个广泛的方面，本发明提供一种光源。 光源包括用于以第一频率发射激光的半导体激光器。 光源还包括包括光纤布拉格光栅的光纤。 光纤布拉格光栅光学耦合到半导体激光器以接收激光，将激光的反射部分反射向激光器并允许透射的部分激光通过光纤布拉格光栅。 光纤布拉格光栅具有温度依赖反射光谱。 频率转换光学元件光学耦合到光纤布拉格光栅，用于接收激光的透射部分，并将激光的透射部分的至少一部分转换成具有与第一频率不同的第二频率的转换光。 输出端口光耦合到变频光学元件，用于输出转换的光。 温度控制器热耦合到光纤布拉格光栅，用于调制光纤布拉格光栅的温度，以便调制反射光谱。
-
公开(公告)号：US6097512A
公开(公告)日：2000-08-01
申请号：US467915
申请日：1999-12-21
Applicant: Benjamin J Ainslie , Douglas L Williams , Graeme D Maxwell , Raman Kashyap , Jonathan R Armitage
Inventor： Benjamin J Ainslie , Douglas L Williams , Graeme D Maxwell , Raman Kashyap , Jonathan R Armitage
IPC: G02B5/18 , C03B19/14 , C03B37/018 , C03C3/06 , C03C3/076 , C03C4/04 , C03C13/04 , G02B6/02 , G02B6/124 , G02B6/34 , G02B27/00 , G03H1/00 , G03H1/02
CPC classification number: G02B6/021 , C03B19/1453 , C03B37/01853 , C03C13/045 , C03C3/06 , C03C3/076 , C03C4/04 , G02B6/124 , C03B2201/31 , C03C2201/31 , C03C2203/50 , G02B6/02133 , Y10S359/90
Abstract: Boron containing glasses are sensitive to radiation in the band 225-275 nm and therefore, B.sub.2 O.sub.3 glasses are particularly adapted to receive refractive index modulation, e.g., to make reflection gratings. Glasses containing SiO.sub.2 and B.sub.2 O.sub.3 are particularly suitable when the grating is to be localized in the cladding of a fibre. Glasses containing SiO.sub.2, GeO.sub.2 and B.sub.2 O.sub.3 are suitable when the grating is in the path region of a waveguide, e.g., in the core of a fibre.
Abstract translation: 含硼玻璃对225-275nm波段的辐射敏感，因此，B 2 O 3玻璃特别适于接收折射率调制，例如制造反射光栅。 当光栅定位在纤维的包层中时，含有SiO 2和B 2 O 3的玻璃特别适合。 当光栅位于波导的路径区域中时，例如在纤维的芯中，含有SiO 2，GeO 2和B 2 O 3的玻璃是合适的。
-
公开(公告)号：US4923278A
公开(公告)日：1990-05-08
申请号：US32964
申请日：1987-03-31
Applicant: Raman Kashyap , Michael H. Reeve , Stephen A. Cassidy , Stephen Hornung
Inventor： Raman Kashyap , Michael H. Reeve , Stephen A. Cassidy , Stephen Hornung
IPC: G02B6/00 , G02B6/02 , G02B6/036 , G02B6/28 , G02B6/34 , G02B6/36 , G02B6/44 , G02F1/01 , G02F1/133
CPC classification number: G02B6/02 , G02F1/0115 , G02F1/132 , G02B6/02033 , G02B6/2861 , G02B6/3628
Abstract: An optical fibre has a coating of, for example, liquid crystal polymer which causes temperature-dependent stress-induced changes in the optical fibre such as to counteract temperature-induced changes in the transmission delay of the fibre.
Abstract translation: 光纤具有例如液晶聚合物的涂层，其导致光纤中温度依赖性应力引起的变化，以抵消温度引起的光纤传输延迟的变化。
-
15.发明授权Optical switching devices having liquid crystal with splayed molecular orientation 失效具有显示分子取向的液晶的光开关元件
公开(公告)号：US4840461A
公开(公告)日：1989-06-20
申请号：US103734
申请日：1987-10-02
Applicant: Christopher S. Winter , Raman Kashyap
Inventor： Christopher S. Winter , Raman Kashyap
CPC classification number: G02F1/1326 , C09K19/3001 , G02F1/3131
Abstract: An optical switch, e.g. a blocking switch or a coupler switch, has a liquid crystal control element which, in at least one of its control configurations, has a splayed molecular orientation. In a preferred embodiment the liquid crystal is surrounded by chemical control surfaces, e.g. by homeotropically coated control surfaces.
-
Patent Agency Ranking
公开(公告)号：US20150043598A1
公开(公告)日：2015-02-12
申请号：US14454220
申请日：2014-08-07
Applicant: Raman Kashyap , Sebastien Loranger , Victor Lambin Iezzi
Inventor： Raman Kashyap , Sebastien Loranger , Victor Lambin Iezzi
CPC classification number: H01S3/302 , H01S3/06754 , H01S3/06791 , H01S3/08013 , H01S3/094023 , H01S3/10092 , H01S3/11 , H01S3/1698
Abstract: The method generally has the steps of propagating a seed wave in an optical fiber; generating a wave of first order by stimulated Brillouin scattering of the seed wave in the optical fiber, the wave of first order having a frequency spectrally shifted from the seed wave and being backscattered from the seed wave; propagating the seed wave and the wave of first order in a feedback cavity thereby generating a plurality of waves of higher order, each wave of higher order being cascadely generated by the wave of previous order, each wave of higher order being backscattered and having a frequency spectrally shifted from its corresponding wave of previous order and forming a frequency comb with the seed wave and the wave of first order; the frequency comb generating optical pulses; and propagating the generated optical pulses out of the feedback cavity.
Abstract translation: 该方法通常具有在光纤中传播种子波的步骤; 通过光纤中的种子波的受激布里渊散射产生一阶波，一阶波具有从种子波频谱偏移并从种子波反向散射的频率; 在反馈空腔中传播种子波和一阶波，从而产生多个较高阶的波，高阶的每个波由前一阶的波级联地产生，高阶的每个波都被反向散射并具有频率 从其先前顺序的相应波形光谱移位，并形成与种子波和一阶波的频率梳; 频率梳生成光脉冲; 并将产生的光脉冲传播出反馈空腔。
-
公开(公告)号：US20070284767A1
公开(公告)日：2007-12-13
申请号：US11785776
申请日：2007-04-20
Applicant: Raman Kashyap
Inventor： Raman Kashyap
IPC: B29D11/00
CPC classification number: B29D11/00663 , G02B6/245
Abstract: A method for treating an optical fiber according to a predetermined treatment, the optical fiber including a light guide and a coating, said coating covering, at least in part, said light guide, said method comprising: heating said coating along a portion thereof to a temperature such that said coating is treated according to said predetermined treatment; and transferring heat to said optical fiber at a rate small enough for substantially preventing said optical fiber from melting.
Abstract translation: 一种根据预定处理的光纤的处理方法，所述光纤包括光导和涂层，所述涂层至少部分地覆盖所述光导，所述方法包括：将所述涂层沿其一部分加热至 温度使得所述涂层根据所述预定处理进行处理; 并以足够小的速率将热量传递到所述光纤，以便基本上防止所述光纤熔化。
-
公开(公告)号：US06307679B1
公开(公告)日：2001-10-23
申请号：US09011995
申请日：1998-03-09
Applicant: Raman Kashyap
Inventor： Raman Kashyap
IPC: G02B518
CPC classification number: G02B6/02152 , G02B6/02085 , G02B6/02133 , G02B6/02138
Abstract: An apodised refractive index grating is recorded in a photosensitive optical fiber by forming first and second component interference patterns with different pitches, that are recorded in the grating such as to result in apodisation. The component patterns are spatially in phase in a central region and move progressively out of phase towards the ends of the patterns. The patterns may be recorded sequentially or concurrently. The fiber may be stretched once or cylically.
-
公开(公告)号：US06075625A
公开(公告)日：2000-06-13
申请号：US302931
申请日：1994-09-22
Applicant: Benjamin J Ainslie , Douglas L Williams , Graeme D Maxwell , Raman Kashyap , Jonathan R Armitage
Inventor： Benjamin J Ainslie , Douglas L Williams , Graeme D Maxwell , Raman Kashyap , Jonathan R Armitage
IPC: G02B5/18 , C03B19/14 , C03B37/018 , C03C3/06 , C03C3/076 , C03C4/04 , C03C13/04 , G02B6/02 , G02B6/124 , G03H1/00 , G02B6/34
CPC classification number: G02B6/021 , C03B19/1453 , C03B37/01853 , C03C13/045 , C03C3/06 , C03C3/076 , C03C4/04 , G02B6/124 , C03B2201/31 , C03C2201/31 , C03C2203/50 , G02B6/02133 , Y10S359/90
Abstract: It has been demonstrated that B containing glasses are sensitive to radiation in the band 225-275 nm and, therefore, B.sub.2 O.sub.3 glasses are particularly adapted to receive refractive index modulation, e.g., to make reflection gratings. Glasses containing SiO.sub.2 and B.sub.2 O.sub.3 are particularly suitable when the grating is to be localized in the cladding of a fiber. Glasses containing SiO.sub.2, GeO.sub.2, and B.sub.2 O.sub.3 are suitable when the grating is in the path region of a waveguide, e.g., in the core of a fiber.
Abstract translation: PCT No.PCT / GB93 / 01321 Sec。 371日期1994年9月22日 102（e）日期1994年9月22日PCT提交1993年6月24日PCT公布。 公开号WO94 / 00784 日期1994年1月6日已经证明含B的玻璃对225-275nm波段的辐射敏感，因此B 2 O 3玻璃特别适于接收折射率调制，例如制造反射光栅。 当光栅定位在纤维的包层中时，含有SiO 2和B 2 O 3的玻璃特别适合。 当光栅位于波导的路径区域中时，例如在纤维的芯中，含有SiO 2，GeO 2和B 2 O 3的玻璃是合适的。
-
20.发明授权Method for customizing optical device configuration after packaging and packaged optical device for use therewith 失效用于定制包装后的光学器件配置的方法以及与其一起使用的封装的光学器件
公开(公告)号：US5719974A
公开(公告)日：1998-02-17
申请号：US500896
申请日：1995-08-01
Applicant: Raman Kashyap
Inventor： Raman Kashyap
CPC classification number: G02B6/02133 , G02B6/12007 , G02B6/4202 , G02B6/4237 , G02B6/02123 , G02B6/29317 , G02B6/29353 , H01S5/02284 , H01S5/146
Abstract: A method of assembling a package including a photosensitively configured optical device providing a window positioned to allow optical frequency electromagnetic radiation from an external source to impinge on a photosensitive part of the optical device. In one embodiment a packaged intermediate product is fabricated, which may subsequently be formed into an external cavity semiconductor laser having certain specified characteristics, by writing a grating into a photosensitive fiber. Use of a window allows the characteristics of the laser to be defined after packaging so that, firstly a large stock of external cavity lasers having all possible characteristics need not be held, and secondly so that the reflectivity of the grating need be chosen only once the degree of coupling between the fiber and the laser diode has been established, thus enhancing the performance of the external cavity laser.
Abstract translation: PCT No.PCT / GB94 / 00180 Sec。 371日期1995年8月1日 102（e）日期1995年8月1日PCT 1994年1月31日PCT PCT。 公开号WO94 / 17448 日期1994年8月4日一种组装包括光敏配置的光学器件的封装的方法，该光学器件提供了一个窗口，该窗口被定位成允许来自外部源的光频电磁辐射撞击在光学器件的光敏部分上。 在一个实施例中，制造封装的中间产品，其随后可以通过将光栅写入感光纤维中而形成具有某些特定特性的外部腔半导体激光器。 使用窗口可以在包装之后定义激光的特性，因此首先需要保持具有所有可能特性的大量外部腔体激光器，其次，使光栅的反射率仅需要选择一次 已经建立了光纤和激光二极管之间的耦合度，从而提高了外腔激光器的性能。
-
-
-
-
-
-
-
-
-
Search Results
35
records
(took 0.017 seconds)
