公开(公告)号：EP1250736A2

公开(公告)日：2002-10-23

申请号：EP01928557.6

申请日：2001-04-16

Applicant: Raytheon Company

Inventor： FUKUMOTO, Joseph, M.

IPC: H01S3/113

CPC classification number: G02F1/39 ,  G02F1/3551 ,  G02F1/3553 ,  G02F2201/16 ,  G02F2201/17 ,  G02F2201/18 ,  G02F2201/34 ,  G02F2203/05 ,  G02F2203/58 ,  H01S3/0809 ,  H01S3/1061 ,  H01S3/113

Abstract: A passive Q switch. The inventive Q switch (230) includes a first wedge (232) of material adapted to absorb electromagnetic energy. The first wedge (232) has a first thickness on a first end thereof and a second thickness on a second end thereof diametrically opposite the first end. The first wedge (232) has a first surface connecting the first and second ends and a second surface (236) connecting the first and second ends. The second surface (236) is slanted relative to the first surface. A second wedge of material (234) is included in the inventive passive Q switch (230). As per the first wedge (232), the second wedge (234) has a first thickness on a first end thereof and a second thickness on a second end thereof diametrically opposite the first end. The second wedge has a first surface connecting the first and second ends and a second surface (238) connecting the first and second ends. The second surface (238) is slanted relative to the first surface. The second surface (236) of the first wedge (232) is mounted in optical alignment with the second surface (238) of the second wedge (234) and in a plane parallel thereto. In the illustrative embodiment, the wedges (232, 234) are made of chromium:yttrium aluminum garnet (Cr+2:YAG) and mounted to allow the first and second wedges to translate relative to each other while maintaining a constant distant 'd' between the second surfaces thereof. The inventive Q switch allows for a variable thickness and lasing hold-off in a passive arrangement.

公开(公告)号：EP1196817A2

公开(公告)日：2002-04-17

申请号：EP01927037.0

申请日：2001-04-16

Applicant: Raytheon Company

Inventor： FUKUMOTO, Joseph, M.

IPC: G02F1/39

CPC classification number: G02F1/39 ,  G02F1/3551 ,  G02F1/3553 ,  G02F2201/16 ,  G02F2201/17 ,  G02F2201/18 ,  G02F2201/34 ,  G02F2203/05 ,  G02F2203/58 ,  H01S3/0809

Abstract: A chemical sensing system and method. The system (10) includes a transmitter (20) having a laser (200) for providing a collimated beam of electromagnetic energy at a first frequency and a Q switch (230) in optical alignment with the beam. The system further inlcudes a crystal for shifting the frequency of the beam from the first frequency to a second frequency. A mechanism is included for shifting the beam from the second frequency to a third frequency in the range of 8-12 microns. Ideally, the input beam is provided by a neodymium-YAG laser and the Q switch is a passive Q switch. The crystal is x-cut potassium titanyl arsenate. The system includes a mechanism for switching the polarization state of the second beam and providing third and fourth beams therefrom. The third beam has a first polarizaion and the fourth beam has a second polarization. The second polyrization is orthogonal relative to the first polarization. The mechanism for shifting the beam from the second frequency to the third frequency includes first and seccond optical parametric oscillators (250 and 271), each optical parametric oscillator including a cadmium selenide crystal. The frequency shifted third and fourth beams are combined to provide an output beam in the range of 8-12 microns. The output beam is transmitted and a return signal therefrom is detected by a receiver in the illustrative chemical sensing application.

公开(公告)号：KR100637928B1

公开(公告)日：2006-10-24

申请号：KR1020040081831

申请日：2004-10-13

Applicant: 한국전자통신연구원

Inventor： 박만용 ,  김병휘

IPC: G02B6/42

CPC classification number: G02B6/138 ,  G02B6/12007 ,  G02B2006/12107 ,  G02F1/0147 ,  G02F2201/06 ,  G02F2201/16 ,  G02F2201/18 ,  G02F2201/307 ,  G02F2203/055 ,  G02F2203/585

Abstract: 본 발명은 C 밴드의 넓은 파장 영역에서 파장가변이 가능하면서, 저가로 구현 가능하여 ONT에 적용가능한 파장가변 광송신모듈에 관한 것으로서, 서로 격자주기가 다른 브래그격자를 병렬 또는 직렬로 배치한 후, 상기 각 브래그격자 영역의 온도를 조절함으로서 광신호의 파장을 넓은 파장 범위에서 낮은 온도 변화를 통해 을 가변시킬 수 있다.
WDM-PON, 광망종단장치(ONT), FTTH, 파장가변 광송신모듈, 도파로, 브래그격자, 열광학 효과,

公开(公告)号：KR1020060032842A

公开(公告)日：2006-04-18

申请号：KR1020040081831

申请日：2004-10-13

Applicant: 한국전자통신연구원

Inventor： 박만용 ,  김병휘

IPC: G02B6/42

CPC classification number: G02B6/138 ,  G02B6/12007 ,  G02B2006/12107 ,  G02F1/0147 ,  G02F2201/06 ,  G02F2201/16 ,  G02F2201/18 ,  G02F2201/307 ,  G02F2203/055 ,  G02F2203/585 ,  G02B2006/12145

Abstract: Disclosed herein is a tunable wavelength optical transmission module, the wavelength of which can be tuned over the wide wavelength region of a C band and which can be implemented at a low price and, thus, can be applied to an optical network terminal. Bragg gratings having different grating periods are arranged in parallel or series and the temperatures of Bragg grating regions are then controlled, so that the wavelength of an optical signal can be tuned over a wide wavelength range through the small variation in temperature.

公开(公告)号：KR1020100091202A

公开(公告)日：2010-08-18

申请号：KR1020107011868

申请日：2008-10-23

Applicant: 코닝 인코포레이티드

Inventor： 골리어,자크 ,  해리스,제임스엠

IPC: H01S3/08 ,  H01S3/10

CPC classification number: G02F1/3532 ,  G02F2201/18 ,  G02F2203/58 ,  H01S5/005 ,  H01S5/0071 ,  H01S5/0092

Abstract: 본 발명의 일 실시 예에 따르면, 파장 변환 장치가 레이저원의 유효 초점 시야에 위치된 각 입력면을 포함하는 다수의 도파관 성분을 포함하는 주파수-변환형 레이저원이 제공된다. 상기 도파관 성분 중 개별 성분은 상기 도파관 성분에 기인한 별개의 파장 변환 속성 세트에 서로 다른 엘리먼트를 부여한다. 상기 별개의 파장 변환 속성 세트는 상기 도파관 성분의 위상 매칭 파장, 상기 도파관 성분의 스펙트럼 폭, 상기 도파관 성분의 변화 효율, 또는 그 조합을 나타내는 속성을 포함한다. 추가 실시 예들이 개시되고 청구된다.

公开(公告)号：KR1020050078976A

公开(公告)日：2005-08-08

申请号：KR1020040078076

申请日：2004-09-30

Applicant: 알카텔-루센트 유에스에이 인코포레이티드

Inventor： 첸용-카이 ,  레번안드레스 ,  투쿤-이

IPC: H03M1/66

CPC classification number: G02F7/00 ,  G02F2201/18

Abstract: 본 발명에 따른 광 디지털-아날로그 변환은 연속파 또는 펄스된 레이저 광 신호를 사용함으로써 실현된다. 레이저 광 신호는 복수개의 상호 응집성 광 빔들로 분할되고, 이들은 아날로그 신호로 변환되어야 할 디지털 데이터 시퀀스의 비트들에 의해 위상 편이 변조된다. 위상 편이 변조된 광 빔들은 목적하는 디지털-아날로그 변환된 광 신호를 실현하기 위해 재조합된다.

公开(公告)号：KR1020130140859A

公开(公告)日：2013-12-24

申请号：KR1020137028901

申请日：2012-03-29

Applicant: 인텔 코포레이션

Inventor： 코브린스키,마우로제이. ,  블록,브루스에이. ,  창,피터엘.

IPC: G02B6/122 ,  G02B6/10

CPC classification number: G02F1/035 ,  G02F1/025 ,  G02F1/065 ,  G02F1/225 ,  G02F2201/18

Abstract: Embodiments of the invention describe a multi-segment optical waveguide that enables an optical modulator to be low-power and athermal by decreasing the device length needed for a given waveguide length. Embodiments of the invention describe an optical waveguide that is folded onto itself, and thus includes at least two sections. Thus, embodiments of the invention may decrease the device size of a modulator by at least around a factor of two if the device is folded twofold (device size may be further reduced if the modulator is folded threefold, four-fold, five-fold, etc.). Embodiments of the invention further enable the electrode length required to create the desired electro-optic effect for the multi-segment optical waveguide to be reduced. In embodiments of the invention, certain electrodes may be shared amongst the different segments of the waveguide, thereby reducing the power requirement and capacitance of a device having a waveguide of a given length.

公开(公告)号：KR1020030008957A

公开(公告)日：2003-01-29

申请号：KR1020010044008

申请日：2001-07-21

Applicant: 삼성전자주식회사

Inventor： 조정환

IPC: G02B6/13

CPC classification number: G02B6/1228 ,  G02B2006/1204 ,  G02B2006/12042 ,  G02B2006/121 ,  G02F1/011 ,  G02F1/0322 ,  G02F2201/18

Abstract: PURPOSE: A heating structure of an optical intensity modulator is provided to minimize an effect force to an adjacent channel by inserting a block waveguide between channels provided to an optical circuit chip, and to minimize emission loss of a waveguide. CONSTITUTION: A channel array is provided on a planar lightwave circuit(PLC) chip(100) so that the lightwave of a specific wavelength processes. The first and second channels(1,2) consist of a core(C1) and claddings(C2) surrounding the core(C1), and the lightwave processes through the first and second channels(1,2). The first channel(1) comprises the first input waveguide(10), the first optical intensity modulator(12), and the first output waveguide(14), and the first channel(2) comprises the second input waveguide(20), the second optical intensity modulator(22), and the second output waveguide(24). Each of the first and the second input waveguide(10,20) receives the lightwave, and each of the first and second optical intensity modulators(12,22) modulates a refractive index of an external signal. A block optical waveguide(B) is inserted between the first and second channels(1,2).

Abstract translation: 目的：提供光强度调制器的加热结构，以通过在提供给光电路芯片的通道之间插入块波导来最小化对相邻通道的影响力，并最小化波导的发射损耗。 构成：在平面光波电路（PLC）芯片（100）上提供通道阵列，使得特定波长的光波进行处理。 第一和第二通道（1,2）由围绕芯（C1）的芯（C1）和包层（C2）组成，并且光波通过第一和第二通道（1,2）处理。 第一通道（1）包括第一输入波导（10），第一光强度调制器（12）和第一输出波导（14），第一通道（2）包括第二输入波导（20） 第二光强度调制器（22）和第二输出波导（24）。 第一和第二输入波导（10,20）中的每一个接收光波，并且第一和第二光强度调制器（12,22）中的每一个调制外部信号的折射率。 块光波导（B）插入在第一和第二通道（1,2）之间。

公开(公告)号：US11906823B2

公开(公告)日：2024-02-20

申请号：US17235168

申请日：2021-04-20

Applicant: II-VI Delaware, Inc.

Inventor： Guomin Jiang ,  Helen Chen ,  Haiji J. Yuan ,  Lixin Wang ,  WenYi Cao ,  Xuewen Lu ,  Qingyu Li ,  Yimin Ji

IPC: G02F1/01 ,  G02F1/133

CPC classification number: G02F1/0136 ,  G02F1/13306 ,  G02F2201/18 ,  G02F2203/055

Abstract: A reconfigurable polarization rotator is formed of an array of very small liquid crystal (LC) cells (e.g., cells of less than 10 μm in width, termed “microcells”), referred to hereinafter as “microcells”. Each LC microcell is addressable by a separate electrical voltage input that independently controls the polarization rotation performed by the associated LC microcell. By defining a set of adjacent microcells to be held at the same voltage level, that group may be used to form a polarization rotator window of a proper size for a first fiber array configuration. When a fiber array of a different configuration (say, an array with twice the pitch) is used, a different-sized group of adjacent LC microcells is held at a common voltage level so as to form a reconfigured “window” of a new dimension.

公开(公告)号：US20230400718A1

公开(公告)日：2023-12-14

申请号：US18250622

申请日：2021-10-22

Applicant: SUMITOMO OSAKA CEMENT CO., LTD. ,  National Institute of Information and Communications Technology

Inventor： Shingo Takano ,  Yu Kataoka ,  Satoshi Oikawa ,  Junichiro Ichikawa ,  Yuya Yamaguchi ,  Atsushi Kanno ,  Naokatsu Yamamoto ,  Tetsuya Kawanishi

IPC: G02F1/035 ,  G02F1/01

CPC classification number: G02F1/035 ,  G02F1/0102 ,  G02F2201/02 ,  G02F2201/18

Abstract: An optical waveguide element includes a substrate, an optical waveguide disposed inside the substrate or on the substrate, and an electrode provided along the optical waveguide, working on the optical waveguide to generate a phase change in a light wave propagating through the optical waveguide. The electrode is a traveling-wave electrode. In a modulation section where the light wave is controlled by the electrode, the electrode and the optical waveguide are configured so that the phase change generated in a first modulation section located within a predetermined distance range from a downstream side end portion along a propagation direction of a traveling wave of an electrical signal propagating through the electrode has a sign opposite to a sign of the phase change generated in a second modulation section located within a predetermined distance range from an input end of the electrical signal on an upstream side along the propagation direction.