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    Synchronized etalon filters
    3.
    发明授权
    Synchronized etalon filters 失效
    同步标准具过滤器

    公开(公告)号：US5434877A

    公开(公告)日：1995-07-18

    申请号：US187438

    申请日：1994-01-27

    Applicant: Yun C. Chung

    Inventor： Yun C. Chung

    IPC: G02B5/28 ,  H01S3/106 ,  H04B10/00 ,  H04B10/155 ,  H01S3/13

    CPC classification number: H04B10/572 ,  H04B10/506

    Abstract: A method for synchronizing an etalon to a preselected set of optical frequencies includes the step of generating a transmission spectrum for an etalon having a characteristic free spectral range that is a function of its effective length. The optical frequencies for the transmission spectrum are provided by two optical reference frequencies such as produced by a first and second frequency locked laser. The effective length of the etalon is set in relation to the optical reference frequencies.

    Abstract translation: 用于将标准具同步到预选的一组光频率的方法包括产生具有作为其有效长度的函数的特征自由光谱范围的标准具的透射光谱的步骤。 用于透射光谱的光学频率由两个光学参考频率提供，例如由第一和第二频率锁定激光器产生的。 标准具的有效长度设置为与光学参考频率有关。

    Tunable etalon filter
    4.
    发明授权
    Tunable etalon filter 失效
    可调谐的标准具过滤器

    公开(公告)号：US5212584A

    公开(公告)日：1993-05-18

    申请号：US875873

    申请日：1992-04-29

    Applicant: Yun C. Chung

    Inventor： Yun C. Chung

    IPC: G02B5/28 ,  G02F1/01 ,  G02F1/19 ,  G02F1/21

    CPC classification number: G02F1/21 ,  G02F1/0147 ,  G02F2001/213 ,  G02F2203/055

    Abstract: A tunable etalon filter is formed by placing mirrors on either side of a spacer of a material which has a relatively large rate of change of refractive index with temperature, and coupling the filter to a thermoelectric cooler to control the temperature of the spacer and, therefore, the index of refraction of the spacer. More specifically, the spacer can be a silicon wafer, or a wafer of zinc sulfide or zinc selenide. The mirrors can be formed of quarter wavelength layer pairs of dielectric coatings of high and low refractive index material. The thermoelectric cooler, which can be coupled to a heat sink, controls the temperature of the spacer by either heating or cooling the spacer. In operation the filter is coarse tuned by adjusting its angle relative to the angle of a received optical signal. It is then fine tuned to the signal by adjusting the temperature of the spacer. The advantages of this filter are: large tunability by angle tuning; fine tuning by temperature; large free-spectral-range; narrow passband; low insertion loss; and high reliability.

    Electrically tunable fiber ring laser
    5.
    发明授权
    Electrically tunable fiber ring laser 失效
    电可调光纤环激光

    公开(公告)号：US5181210A

    公开(公告)日：1993-01-19

    申请号：US820110

    申请日：1992-01-13

    Applicant: Yun C. Chung ,  David J. DiGiovanni ,  Julian Stone ,  James W. Sulhoff ,  John L. Zyskind

    Inventor： Yun C. Chung ,  David J. DiGiovanni ,  Julian Stone ,  James W. Sulhoff ,  John L. Zyskind

    IPC: H01S3/067 ,  H01S3/106

    CPC classification number: H01S3/06791 ,  H01S3/1062

    Abstract: A compact all-fiber, electrically tunable ring laser includes a diode-pumped erbium-doped fiber amplifier. The frequency of the laser is tuned by a fiber Fabry-Perot (FFP) etalon that is electrically tuned. An in-line optical isolator is used in conjunction with the FFP to eliminate undesired reflections. A second FPP with a narrow free spectral range (FSR) can be used in conjunction with a first FFP with a wide FSR.

    Abstract translation: 紧凑型全光纤，电可调环形激光器包括二极管泵浦掺铒光纤放大器。 激光器的频率由电气调谐的光纤法布里 - 珀罗（FFP）标准器调谐。 在线光隔离器与FFP结合使用以消除不必要的反射。 具有窄自由光谱范围（FSR）的第二个FPP可与具有宽FSR的第一个FFP结合使用。

    Frequency stabilization of long wavelength semiconductor laser via optogalvanic effect
    7.
    发明授权
    Frequency stabilization of long wavelength semiconductor laser via optogalvanic effect 失效
    通过光电效应对长波长半导体激光器进行频率稳定

    公开(公告)号：US4932030A

    公开(公告)日：1990-06-05

    申请号：US361472

    申请日：1989-06-05

    Applicant: Yun C. Chung

    Inventor： Yun C. Chung

    IPC: H01S5/0687

    CPC classification number: H01S5/0687

    Abstract: Frequency stabilization of a long wavelength semiconductor laser is achieved by employing the optogalvanic effect in a feedback control loop with the laser. Absolute references are obtained using noble gases such as argon (1.2 .mu.m to 1.4 .mu.m) and krypton (1.4 .mu.m to 1.6 .mu.m). Standard detection, feedback control and dithering lock-in techniques are used to insure proper frequency stabilization.

    Abstract translation: 通过在与激光器的反馈控制环路中采用光电效应来实现长波长半导体激光器的稳定化。 使用氩气（1.2μm〜1.4μm），氪（1.4μm〜1.6μm）等惰性气体进行绝对参照。 使用标准检测，反馈控制和抖动锁定技术确保适当的频率稳定。

    Spot size converters and methods of manufacturing the same
    8.
    发明授权
    Spot size converters and methods of manufacturing the same 有权
    现货尺寸转换器及其制造方法

    公开(公告)号：US09036969B2

    公开(公告)日：2015-05-19

    申请号：US13618353

    申请日：2012-09-14

    Applicant: Oh Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Young Ahn Leem ,  Young-Tak Han ,  Yongsoon Baek ,  Yun C. Chung

    Inventor： Oh Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Young Ahn Leem ,  Young-Tak Han ,  Yongsoon Baek ,  Yun C. Chung

    IPC: G02B6/26 ,  C03B37/022 ,  G02B6/122 ,  G02B6/30

    CPC classification number: G02B6/1228 ,  G02B6/305

    Abstract: Provided are a spot size converter and a method of manufacturing the spot size converter. The method includes stacking a lower clad layer, a core layer, and a first upper clad layer on a substrate, tapering the first upper clad layer and the core layer in a first direction on a side of the substrate, forming a waveguide layer on the first upper clad layer and the lower clad layer, and etching the waveguide layer, the first upper clad layer, the core layer, and the lower clad layer such that the waveguide layer is wider than a tapered portion of the core layer on the side of the substrate and has the same width as that of the core layer on another side of the substrate.

    Abstract translation: 提供了点尺寸转换器和制造光斑尺寸转换器的方法。 该方法包括在基板上层叠下包层，芯层和第一上包覆层，使第一上包覆层和芯层在衬底侧沿第一方向逐渐变细，在衬底的一侧形成波导层 第一上包覆层和下包层，并且蚀刻波导层，第一上包层，芯层和下包层，使得波导层比芯层的锥形部分宽 并且具有与基板的另一侧上的芯层的宽度相同的宽度。

    SPOT SIZE CONVERTERS AND METHODS OF MANUFACTURING THE SAME
    10.
    发明申请
    SPOT SIZE CONVERTERS AND METHODS OF MANUFACTURING THE SAME 有权
    SPOT SIZE转换器及其制造方法

    公开(公告)号：US20130266263A1

    公开(公告)日：2013-10-10

    申请号：US13618353

    申请日：2012-09-14

    Applicant: Oh Kee KWON ,  Chul-Wook LEE ,  Dong-Hun LEE ,  Young Ahn LEEM ,  Young-Tak HAN ,  Yongsoon BAEK ,  Yun C. CHUNG

    Inventor： Oh Kee KWON ,  Chul-Wook LEE ,  Dong-Hun LEE ,  Young Ahn LEEM ,  Young-Tak HAN ,  Yongsoon BAEK ,  Yun C. CHUNG

    IPC: G02B6/26 ,  H01P11/00

    CPC classification number: G02B6/1228 ,  G02B6/305

    Abstract: Provided are a spot size converter and a method of manufacturing the spot size converter. The method includes stacking a lower clad layer, a core layer, and a first upper clad layer on a substrate, tapering the first upper clad layer and the core layer in a first direction on a side of the substrate, forming a waveguide layer on the first upper clad layer and the lower clad layer, and etching the waveguide layer, the first upper clad layer, the core layer, and the lower clad layer such that the waveguide layer is wider than a tapered portion of the core layer on the side of the substrate and has the same width as that of the core layer on another side of the substrate.

    Abstract translation: 提供了点尺寸转换器和制造光斑尺寸转换器的方法。 该方法包括在基板上层叠下包层，芯层和第一上包覆层，使第一上包覆层和芯层在衬底侧沿第一方向逐渐变细，在衬底的一侧上形成波导层 第一上包覆层和下包层，并且蚀刻波导层，第一上包层，芯层和下包层，使得波导层比芯层的锥形部分宽 并且具有与基板的另一侧上的芯层的宽度相同的宽度。

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