公开(公告)号：CA2561711A1

公开(公告)日：2005-11-03

申请号：CA2561711

申请日：2005-02-02

Applicant: ZOLO TECHNOLOGIES INC

Inventor： SMITH IAN S ,  HUELSON ERIC C ,  MASTERSON BERNARD PATRICK

IPC: G01J3/36 ,  G02B6/26 ,  G01D5/353 ,  G01J3/10 ,  G01K11/32 ,  G01N21/359 ,  G02B6/14

Abstract: An optical mode noise averaging device (300) including a multimode optical fiber (302) and means (308) for averaging a modal noise induced signal level variation of light propagating within the multimode optical fiber (302). The device may average modal noise induced signal level variations by cyclically varying an index of refraction of the multimode optical fiber (302) over a select period of time, scrambling a light distribution within the multimode optical fiber (302), or both. The index of refraction of the multimode optic al fiber may be cyclically varied by cyclically varying the temperature of the multimode optical fiber (302). Alternatively, the index for refraction may b e varied or the light distribution within the multimode optical fiber may be scrambled by cyclically manipulating the multimode optical fiber (302).

公开(公告)号：AU2003283074A1

公开(公告)日：2004-02-25

申请号：AU2003283074

申请日：2003-07-30

Applicant: ZOLO TECHNOLOGIES INC

Inventor： HUANG PEI ,  SPULER SCOTT ,  WHITAKER KEVIN

IPC: G02B6/34

Abstract: A (de)multiplexer for use in optical communications systems for multiplexing and demultiplexing an optical signal consisting of optical channel(s) of different wavelength(s) includes a multiplex optical waveguide propagating a plurality of optical channels and a plurality of single channel optical waveguides, each propagating a single channel. Each of the waveguides has a receiving/transmitting end. A diffraction grating is optically coupled between the multiplex optical waveguide and the single channel optical waveguides for diffracting an optical signal between the receiving/transmitting end of the multiplex optical waveguide and the receiving/transmitting end of the single channel optical waveguide. The grooves of the diffraction have spacing which varies according to an algorithm such that a portion of the optical signal diffracted by each groove is offset in a direction of dispersion relative to the portions of the optical signal diffracted by the other surfaces to broaden the transmission band at the receiving/transmitting ends of the single channel and multiplex optical waveguides. A method for fabricating a grating as described above includes etching grooves having spacing which varies according to the algorithm such that a portion of the optical signal diffracted by each surface is offset in a direction of dispersion relative to portions of the optical signal diffracted by each other surface.

公开(公告)号：CA2383611A1

公开(公告)日：2001-03-15

申请号：CA2383611

申请日：2000-08-31

Applicant: ZOLO TECHNOLOGIES INC

Inventor： SAPPEY ANDREW D ,  MURPHY GERRY

IPC: G02B5/18 ,  G02B6/293 ,  G02B6/34

Abstract: A dense wavelength multiplexer/demultiplexer ("DWDM") (10) for us in optical communication systems includes a multiplex optical waveguide (14) propagatin g a plurality of optical channels (.lambda.iest;1-n) of a select channel spaci ng multiplexed as a single optical signal within a select near infrared wavelength range. a collimating/focusing optic (18) is optically coupled to the multiplexed optical waveguide at a select focal length. A reflective echelle grating (20) is optically coupled to the collimating/focusing optic (18). The echelle grating (20) has a groove spacing (d) and blaze angle (.theta.b) providing a channel spacing (d) of the multiplexed optical signal (.lambda.l-n) at the select focal length for a select order of diffraction. A linear array of single channel waveguides (16), each propagating a single channel within the near infrared wavelength range is optically coupled to th e collimating/focusing optic. Each optical single channel waveguide (16) has a center and a propagating end and the propagating ends are spaced the focal length from the collimating/focusing optic and the centers of adjacent demultiplexed waveguides are spaced the select channel spacing (D). A fiber pigtail harness is used to connect the multiplexer which works in a Littrow configuration.

公开(公告)号：US20180038788A1

公开(公告)日：2018-02-08

申请号：US15538156

申请日：2015-11-18

Applicant: Zolo Technologies, Inc.

Inventor： Andrew D. Sappey ,  Bernard Patrick Masterson

IPC: G01N21/39 ,  G02B6/40 ,  G02B6/04 ,  G02B6/35 ,  G02B6/36 ,  G02B6/42

CPC classification number: G01N21/39 ,  B01D53/30 ,  F23N5/00 ,  G01N2021/399 ,  G01N2201/0833 ,  G02B6/04 ,  G02B6/3598 ,  G02B6/3624 ,  G02B6/3672 ,  G02B6/40 ,  G02B6/4292

Abstract: A system for widely spaced wavelength tunable diode laser absorption spectroscopy includes at least a first and second tunable diode laser generating laser light at a first and second wavelength, wherein laser light of the first and second wavelengths cannot co-propagate efficiently on the same single-mode fiber. A first fiber may be configured to carry light in the first wavelength, and a second fiber configured to carry light in the second wavelength. A fiber bundle may be formed from the distal ends of the first and second fibers stripped of their respective coatings, and arranged with their claddings adjacent to each other. One or more pitch heads are configured to project respective beams of laser light from the fiber bundle through a measurement zone. One or more catch heads located across the measurement zone receive the respective beams and direct the respective beams onto at least one sensor.

公开(公告)号：US09366621B2

公开(公告)日：2016-06-14

申请号：US14395037

申请日：2013-03-15

Applicant: Zolo Technologies, Inc.

Inventor： Jim Howell ,  Bernard Patrick Masterson ,  Rod Harris ,  David Giltner ,  Atilio Jobson ,  Michael John Estes ,  Andrew D. Sappey

IPC: G01N21/55 ,  G01N21/39 ,  G01N21/84 ,  F23M11/04 ,  F23N5/08 ,  F23M20/00 ,  G01J3/02 ,  G02B5/122 ,  G01J3/42

CPC classification number: G01N21/39 ,  F23M11/045 ,  F23M20/00 ,  F23N5/082 ,  F23N2029/00 ,  F23N2900/05005 ,  G01J3/021 ,  G01J3/0289 ,  G01J3/42 ,  G01N21/84 ,  G01N2021/399 ,  G01N2201/0612 ,  G02B5/122

Abstract: A method of monitoring combustion properties in an interior of a furnace is described. A beam of light is projected through a pitch optic including a pitch collimating lens residing outside the boiler interior. The pitch collimating lens projects the beam through a penetration into the boiler interior. The beam of light projected by the pitch collimating lens is reflected from at least one in-furnace retro-reflector, and received with a catch optic substantially identical to the pitch optic residing outside the boiler interior. The pitch optic and the catch optic may be embodied in the same pitch/catch optic. The pitch collimating lens may also be steered toward another of the at least one in-furnace retro-reflectors. Combustion properties may be calculated for each retro-reflector based on retro-reflector zones within the furnace.

Abstract translation: 描述了一种监测炉内燃烧特性的方法。 光束通过包括位于锅炉内部外部的间距准直透镜的俯仰光学镜投射。 俯仰准直透镜通过穿透进入锅炉内部来投射光束。 由间距准直透镜投影的光束从至少一个炉内回射反射器反射，并且被接收到与驻留在锅炉内部外部的俯仰光学器件基本相同的捕捉光学器件。 俯仰光学器件和捕捉光学元件可以以相同的俯仰/捕捉光学元件来实现。 间距准直透镜也可以被转向至少一个炉内反射器中的另一个。 可以基于炉内的后向反射器区域为每个后向反射器计算燃烧特性。

公开(公告)号：CA2561711C

公开(公告)日：2012-12-18

申请号：CA2561711

申请日：2005-02-02

Applicant: ZOLO TECHNOLOGIES INC

Inventor： MASTERSON BERNARD PATRICK ,  HUELSON ERIC C ,  SMITH IAN S

IPC: G01J3/36 ,  G02B6/26 ,  G01D5/353 ,  G01J3/10 ,  G01K11/32 ,  G01N21/359 ,  G02B6/14

Abstract: An optical mode noise averaging device (300) including a multimode optical fiber (302) and means (308) for averaging a modal noise induced signal level variation of light propagating within the multimode optical fiber (302). The device may average modal noise induced signal level variations by cyclically varying an index of refraction of the multimode optical fiber (302) over a select period of time, scrambling a light distribution within the multimode optical fiber (302), or both. The index of refraction of the multimode optical fiber may be cyclically varied by cyclically varying the temperature of the multimode optical fiber (302). Alternatively, the index for refraction may be varied or the light distribution within the multimode optical fiber may be scrambled by cyclically manipulating the multimode optical fiber (302).

公开(公告)号：AU2010282589A1

公开(公告)日：2012-03-08

申请号：AU2010282589

申请日：2010-08-10

Applicant: ZOLO TECHNOLOGIES INC

Inventor： MASTERSON BERNARD PATRICK ,  HOWELL JAMES ,  HOFVANDER HENRIK ,  SAPPEY ANDREW D

IPC: F02C7/22

Abstract: An apparatus and methods for measuring combustion parameters in the measurement zone of a gas turbine engine. The measurement zone is defined as being between an outer casing and an engine component having a reflecting surface inside the outer casing. The apparatus comprises a laser generating a transmitting beam of light of a select wavelength and a multimode transmitting fiber optically coupled to the laser. A transmitting optic is optically coupled to the multimode optical fiber for transmitting the beam into the measurement zone. The reflecting surface is configured to provide a Lambertian reflection. A receiving optic is positioned to receive the Lambertian reflection. Means are provided in operative association with the multimode transmitting fiber for averaging modal noise induced signal level variation of light propagating within the multimode transmitting fiber.

公开(公告)号：CA2685929A1

公开(公告)日：2008-12-04

申请号：CA2685929

申请日：2008-05-23

Applicant: ZOLO TECHNOLOGIES INC

Inventor： HOFVANDER HENRIK ,  SAPPEY ANDREW D ,  ZHAO QINGCHUN ,  HOWELL JAMES

IPC: G01N21/00

Abstract: A method of absorption spectroscopy including obtaining absorption data a t multiple wavelengths along more than one line-of-sight path through a quan tity of gas of interest. The method further includes identifying more than o ne temperature and gas species concentration bin along the multiple line-of- sight paths and creating a map of temperature and gas species concentration. The map thus created will have at least two-dimensional information derived from select temperature and gas species concentration bins identified along more than one line-of-sight path. Apparatus for implementing the above meth od is also disclosed.

公开(公告)号：AU781433B2

公开(公告)日：2005-05-26

申请号：AU7472000

申请日：2000-08-31

Applicant: ZOLO TECHNOLOGIES INC

Inventor： SAPPEY ANDREW D ,  MURPHY GERRY

IPC: G02B5/18 ,  G02B6/293 ,  G02B6/34

公开(公告)号：CA2406458A1

公开(公告)日：2001-10-18

申请号：CA2406458

申请日：2001-04-06

Applicant: ZOLO TECHNOLOGIES INC

Inventor： SAPPEY ANDREW D

IPC: G02B5/08 ,  G02B5/18 ,  G02B6/34

Abstract: A diffraction grating (10') for use in multiplexing and demultiplexing optic al signals in optical communication systems having reduced polarization sensitivity has a plurality of reflective step surfaces (16') separated by a plurality of riser surfaces (18') defining grooves of the grating. The step surfaces (16') have a reflective coating (22') and the riser surfaces (18') do not have a conductive coating. A method of making a reflective diffraction grating includes forming a plurality of grooves in a substrate, the grooves having a reflective surface for reflecting an incident beam and non-reflecti ve surface and providing a reflective coating on the reflective surface and not on the non-reflective surface.