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公开(公告)号：CA2831693C
公开(公告)日：2019-02-12
申请号：CA2831693
申请日：2012-03-22
Applicant: KOTURA INC
Inventor： FENG DAZENG , QIAN WEI
Abstract: The device includes a main waveguide on a base. The main waveguide is configured to guide a light signal through a light-transmitting medium. The device also includes multiple transition waveguides on the base. Each of the transition waveguide intersects a terminal end of the main waveguide such that each transition waveguide receives a different portion of the light signal from the main waveguide. The device also includes one or more light sensors positioned on the base. Each transition waveguide guides the received light portions to the one or more light sensors such that each of the light signal portions is received at the one or more light sensors.
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公开(公告)号：CA2684409C
公开(公告)日：2017-01-10
申请号：CA2684409
申请日：2008-04-24
Applicant: KOTURA INC
Inventor： FENG DAZENG , ASGHARI MEHDI , LUFF BRADLEY JONATHAN
Abstract: An optical device includes an echelle grating and input waveguide arranged such that the echelle grating receives an input signal that exits from a port of the input waveguide. The echelle grating is configured to reflect the input signal such that when the input signal has a plurality of channels, the input signal separates into output signals that each includes a different one of the channels. The device also includes a plurality of output waveguides that each includes a port positioned to receive one of the output signals. The output waveguides include central waveguides. The central waveguides are the three centermost output waveguides when the total number of output waveguides is odd and the two centermost output waveguides when the total number of output waveguides is even. The central waveguides are positioned such that the grating axis passes through the port associated with one of the central waveguides or passes between the ports associated with the central waveguides.
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公开(公告)号：CA2795227A1
公开(公告)日：2011-12-01
申请号：CA2795227
申请日：2011-04-07
Applicant: KOTURA INC
Inventor： FENG DAZENG , QIAN WEI , ASGHARI MEHDI
Abstract: An optical device includes a light-transmitting medium positioned on a base. The light-transmitting medium at least partially defines a free propagation region through which light signals travel. A reflective grating includes stepped reflecting surfaces positioned such that light signals that travel through the free propagation region are received by the reflecting surfaces. The reflecting surfaces are configured to reflect the light signal back into the free propagation region such that the light signals associated with different wavelengths separate as the light signals travel through the free propagation region. At least a portion of the reflecting surfaces each includes an overtapping region. Additionally, at least a portion of the reflecting surfaces each includes an overlapped region and un un-overlapped region. The reflecting grating is configured such that the light signals travel toward the overlapped regions and the un-overlapped regions before being reflected
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公开(公告)号：CA2781505A1
公开(公告)日：2011-06-30
申请号：CA2781505
申请日：2010-11-17
Applicant: KOTURA INC
Inventor： FENG DAZENG , ASGHARI MEHDI , QIAN WEI , KUNG CHENG-CHIH , FONG JOAN
IPC: G02B6/34
Abstract: An optical device includes a light-transmitting medium on a base. The light-transmitting medium at least partially defines a free propagation region through which light signals travel. A reflective grating is positioned such that light signals can travel through the free propagation region and be received by the optical grating. The optical grating is configured to reflect the received light signal back into the free propagation region. The optical grating reflects the light signals such that light signals associated with different wavelengths separate as the light signals travel through the free propagation region. The portion of the light-transmitting medium that defines the free propagation region has a facet through with the light signals are transmitted. The grating includes a buffer layer between the facet and a reflecting layer that is configured to reflect the light signals received by the grating.
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公开(公告)号：CA2805854C
公开(公告)日：2017-11-07
申请号：CA2805854
申请日：2011-06-03
Applicant: KOTURA INC
Inventor： FENG DAZENG , ASGHARI MEHDI , LUFF BRADLEY JONATHAN , SHAFIIHA ROSHANAK
Abstract: The device includes a waveguide on a base. The waveguide includes an input portion, a light-absorbing portion, and an output portion. The input portion of the waveguide is partially defined by a light-transmitting medium. The light-absorbing portion of the waveguide is configured to guide a transmitted portion of the light signal to the output portion of the waveguide. Additionally, the light-absorbing portion of the waveguide is partially defined by a light-absorbing medium different from the light-transmitting medium. The output portion of the waveguide is configured to receive the transmitted portion of the light signal from the light-absorbing portion of the waveguide and to guide the transmitted portion of the light signal away from the light-absorbing portion. The output portion of the waveguide is partially defined by the light-transmitting medium. The device also includes a monitor positioned on the base and is configured to monitor absorption of the absorbed portion of the light signal.
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Patent Agency Ranking
公开(公告)号：CA2781505C
公开(公告)日：2017-03-07
申请号：CA2781505
申请日：2010-11-17
Applicant: KOTURA INC
Inventor： FENG DAZENG , ASGHARI MEHDI , QIAN WEI , KUNG CHENG-CHIH , FONG JOAN
IPC: G02B6/124
Abstract: An optical device includes a light-transmitting medium on a base. The light-transmitting medium at least partially defines a free propagation region through which light signals travel. A reflective grating is positioned such that light signals can travel through the free propagation region and be received by the optical grating. The optical grating is configured to reflect the received light signal back into the free propagation region. The optical grating reflects the light signals such that light signals associated with different wavelengths separate as the light signals travel through the free propagation region. The portion of the light-transmitting medium that defines the free propagation region has a facet through with the light signals are transmitted. The grating includes a buffer layer between the facet and a reflecting layer that is configured to reflect the light signals received by the grating.
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公开(公告)号：CA2831693A1
公开(公告)日：2012-10-18
申请号：CA2831693
申请日：2012-03-22
Applicant: KOTURA INC
Inventor： FENG DAZENG , QIAN WEI
IPC: G02B6/26
Abstract: The device includes a main waveguide on a base. The main waveguide is configured to guide a light signal through a light-transmitting medium. The device also includes multiple transition waveguides on the base. Each of the transition waveguide intersects a terminal end of the main waveguide such that each transition waveguide receives a different portion of the light signal from the main waveguide. The device also includes one or more light sensors positioned on the base. Each transition waveguide guides the received light portions to the one or more light sensors such that each of the light signal portions is received at the one or more light sensors.
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公开(公告)号：CA2795227C
公开(公告)日：2019-06-25
申请号：CA2795227
申请日：2011-04-07
Applicant: KOTURA INC
Inventor： FENG DAZENG , QIAN WEI , ASGHARI MEHDI
Abstract: An optical device includes a light-transmitting medium positioned on a base. The light-transmitting medium at least partially defines a free propagation region through which light signals travel. A reflective grating includes stepped reflecting surfaces positioned such that light signals that travel through the free propagation region are received by the reflecting surfaces. The reflecting surfaces are configured to reflect the light signal back into the free propagation region such that the light signals associated with different wavelengths separate as the light signals travel through the free propagation region. At least a portion of the reflecting surfaces each includes an overtapping region. Additionally, at least a portion of the reflecting surfaces each includes an overlapped region and un un-overlapped region. The reflecting grating is configured such that the light signals travel toward the overlapped regions and the un-overlapped regions before being reflected
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公开(公告)号：CA2776048C
公开(公告)日：2017-06-06
申请号：CA2776048
申请日：2010-09-16
Applicant: KOTURA INC
Inventor： ASGHARI MEHDI , FENG DAZENG
IPC: G01J1/42 , H01L31/101
Abstract: The optical device includes a waveguide and a light sensor on a base. The light sensor includes a ridge extending from slab regions positioned on opposing sides of the ridge. The ridge includes a multiplication layer and an absorption layer. The absorption layer is positioned to receive at least a portion of the light signal from the waveguide. Additionally, the absorption layer generates a hole and electron pair in response to receiving a photon of the light signal. The multiplication layer is positioned to receive the electron generated in the absorption layer and to generate additional electrons in response to receiving the electron.
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公开(公告)号：CA2749973C
公开(公告)日：2017-01-10
申请号：CA2749973
申请日：2010-02-08
Applicant: KOTURA INC
Inventor： FENG DAZENG , DONG PO , ASGHARI MEHDI , FENG NING-NING
IPC: G01J1/42 , H01L31/09 , H01L31/105 , H01L31/18
Abstract: The optical device includes a waveguide and a light sensor on a base. The light sensor includes a light-absorbing medium configured to receive a light signal from the waveguide. The light sensor also includes field sources for generating an electrical field in the light-absorbing medium. The field sources are configured so the electrical field is substantially parallel to the base.
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