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1. 发明授权

US06621968B1 Optical fiber for broadband optical devices and optical fiber devices using thereof 失效
标题翻译：用于宽带光学设备的光纤和使用它的光纤设备
公开(公告)号：US06621968B1
公开(公告)日：2003-09-16
申请号：US09601934
申请日：2000-12-19
申请人： Yeon Wan Koh , Jin Ha Kim , Bong Wan Lee , Seok Hyun Yun , Byoung Yoon Kim , Kyung Hwan Oh
发明人： Yeon Wan Koh , Jin Ha Kim , Bong Wan Lee , Seok Hyun Yun , Byoung Yoon Kim , Kyung Hwan Oh
IPC分类号： G02B616
CPC分类号： G02F1/0134 , G02B6/14 , G02B6/2793 , G02B6/29377
摘要： The present invention relates to an optical fiber having a normalized frequency applicable to a broadband optical device, and to a broadband, polarization-independent, low-loss optical fiber device made by using the aforementioned optical fiber. The optical fiber of the present invention has a normalized frequency value V, structural parameters of which including a core radius, a core refractive index and a cladding refractive index are adjusted to minimize the beat dispersion between first and second modes in a predetermined frequency range. Various optical fiber devices may be achieved if the aforementioned optical fiber is used along with acoustic wave generating means and a mode dropper or a mode selective coupler.
摘要翻译：本发明涉及具有适用于宽带光学装置的归一化频率的光纤，以及使用上述光纤制成的宽带，偏振无关的低损耗光纤装置。本发明的光纤具有归一化的频率值V，其结构参数包括芯半径，纤芯折射率和包层折射率，以使预定频率范围内的第一和第二模式之间的拍频差异最小化。如果上述光纤与声波产生装置以及模式滴管或模式选择耦合器一起使用，则可以实现各种光纤装置。

2. 发明授权

US06266456B1 Optical fiber polarization scrambler and operating parameter input method therefor 有权
标题翻译：光纤极化扰频器及其操作参数输入方法
公开(公告)号：US06266456B1
公开(公告)日：2001-07-24
申请号：US09403379
申请日：1999-10-19
申请人： Bong Wan Lee , Yeon Wan Koh , Young Bae Yeo , Byoung Yoon Kim
发明人： Bong Wan Lee , Yeon Wan Koh , Young Bae Yeo , Byoung Yoon Kim
IPC分类号： G02B600
CPC分类号： G02B6/2786 , G02F1/0134 , G02F2001/0139
摘要： An optical fiber polarization scrambler decreasing the degree of polarization (DOP) of light efficiently using at least two optical fiber birefringence modulators (10, 11) and an operating parameter input method for the same. Birefringence modulators are constructed with hollow cylindrical piezo devices (10, 11) and a strand of optical fiber (30) wound continuously on the outer walls of the piezo devices (10, 11). An angle between the birefringence modulators consisting of the optical fiber polarization scrambler is configured to compensate the effect of circular birefringence. A method for exactly configuring birefringence modulation frequency and birefringence modulation amplitude to achieve effective polarization scrambling for the optical fiber polarization scrambler is also provided.
摘要翻译：光纤偏振加扰器使用至少两个光纤双折射调制器（10,11）及其操作参数输入方法有效地降低光的偏振度（DOP）。双折射调制器由中空圆柱形压电器件（10,11）和连续缠绕在压电器件（10,11）的外壁上的一束光纤（30）构成。由光纤偏振扰乱器组成的双折射调制器之间的角度被配置为补偿圆形双折射的影响。还提供了用于精确配置双折射调制频率和双折射调制幅度以实现光纤极化扰频器的有效偏振加扰的方法。

3. 发明授权

US06532323B2 Acousto-optic filter 失效
标题翻译：声光滤镜
公开(公告)号：US06532323B2
公开(公告)日：2003-03-11
申请号：US09738282
申请日：2000-12-14
申请人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
发明人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
IPC分类号： G02F1295
CPC分类号： G02F1/125 , G02B6/02071 , G02B6/14 , G02F1/0134
摘要： An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
摘要翻译：声光滤波器具有非双折射单模光纤，其具有与芯部周围关系的纵轴，芯和包层。光纤具有多个包层模式和沿核心引导的单核心模式。声波传播构件具有耦合到光纤的近端和远端。声波传播部件将声波从近端传播到远端，并且在光纤中发射弯曲波。至少一个声波发生器耦合到声波传播构件的近端。

4. 发明授权

US06266462B1 Acousto-optic filter 有权
标题翻译：声光滤镜
公开(公告)号：US06266462B1
公开(公告)日：2001-07-24
申请号：US09426060
申请日：1999-10-22
申请人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
发明人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
IPC分类号： G02F1295
CPC分类号： G02F1/125 , G02B6/02071 , G02B6/14 , G02F1/0134
摘要： An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.
摘要翻译：声光滤波器具有非双折射单模光纤，其具有与芯部周围关系的纵轴，芯和包层。光纤具有多个包层模式和沿核心引导的单核心模式。声波传播构件具有耦合到光纤的近端和远端。声波传播部件将声波从近端传播到远端，并且在光纤中发射弯曲波。至少一个声波发生器耦合到声波传播构件的近端。

5. 发明授权

US06253002B1 Acousto-optic filter 有权
公开(公告)号：US06253002B1
公开(公告)日：2001-06-26
申请号：US09571092
申请日：2000-05-15
申请人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
发明人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
IPC分类号： G02B626
CPC分类号： G02F1/125 , G02B6/02071 , G02B6/14
摘要： An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.

6. 发明授权

US06535665B1 Acousto-optic devices utilizing longitudinal acoustic waves 失效
标题翻译：使用纵向声波的声光器件
公开(公告)号：US06535665B1
公开(公告)日：2003-03-18
申请号：US09577213
申请日：2000-05-23
申请人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee , Wayne Sorin
发明人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee , Wayne Sorin
IPC分类号： G02B626
CPC分类号： G02F1/0134 , G02B6/02071 , G02F1/125 , G02F2201/02 , G02F2201/16 , G02F2202/32 , G02F2203/055 , G02F2203/585 , H04J14/0208 , H04J14/0209 , H04J14/0213
摘要： An acousto-optic filter includes an optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes. At least one acoustic wave generator is included and made of a sufficiently high frequency piezoelectric material to produce a longitudinal acoustic wave. An acoustic wave propagation member has proximal and distal ends. The distal end is coupled to the optical fiber and the proximal end is coupled to the acoustic wave generator. The acoustic wave propagation member propagates the longitudinal acoustic wave from the proximal to the distal ends and excites the longitudinal acoustic wave in the optical fiber.
摘要翻译：声光滤波器包括具有纵向轴线的光纤，芯部和与芯部的周围关系的包层。光纤具有多个包层模式。包括至少一个声波发生器并由足够高频率的压电材料制成以产生纵向声波。声波传播部件具有近端和远端。远端连接到光纤，并且近端耦合到声波发生器。声波传播部件将纵向声波从近端传播到远端，激发光纤中的纵向声波。

7. 发明授权

US06233379B1 Acousto-optic filter 有权
公开(公告)号：US06233379B1
公开(公告)日：2001-05-15
申请号：US09425099
申请日：1999-10-22
申请人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
发明人： Byoung Yoon Kim , Seok Hyun Yun , Bong Wan Lee
IPC分类号： G02B626
CPC分类号： G02F1/125 , G02B6/02071 , G02B6/14
摘要： An acousto-optic filter has a non-birefringent single mode optical fiber with a longitudinal axis, a core and a cladding in a surrounding relationship to the core. The optical fiber has multiple cladding modes and a single core mode that is guided along the core. An acoustic wave propagation member has a proximal end and a distal end coupled to the optical fiber. The acoustic wave propagation member propagates an acoustic wave from the proximal to the distal end and launches a flexural wave in the optical fiber. At least one acoustic wave generator is coupled to the proximal end of the acoustic wave propagation member.

8. 发明授权

US06657709B2 Apparatus and method for measuring polarization-dependent loss using repeated high speed polarization scrambling 有权
公开(公告)号：US06657709B2
公开(公告)日：2003-12-02
申请号：US10276480
申请日：2002-11-15
申请人： Yeon Wan Koh , Bong Wan Lee , Jung Won Kim
发明人： Yeon Wan Koh , Bong Wan Lee , Jung Won Kim
IPC分类号： G01N2100
CPC分类号： G01M11/337 , G02B6/105
摘要： Disclosed is an apparatus and method for measuring a changing amount of insertion loss of an optical device depending on a polarization state of an incident light, i.e., a polarization-dependent loss. An incident light that is periodically subject to all polarization states passes through a testing optical device by a polarization scrambler including a piezoelectric element type optical fiber birefringence modulator, and an optical detector measures intensity of the passing light, in which the measured intensity values are averaged for birefringence modulation having a constant period, and then the polarization-dependent loss is computed from a ratio of maximum power to minimum power for the period. Use of the birefringence modulator shortens measuring time, and decreases an affect of external disturbance to the incident light that is incident into the testing optical component or occurrence probability of the external disturbance, so that the polarization-dependent loss can be precisely measured.

9. 发明授权

US06377351B1 Fiber laser gyroscope with phase sensitive detection 失效
标题翻译：光纤激光陀螺仪，具有相敏检测功能
公开(公告)号：US06377351B1
公开(公告)日：2002-04-23
申请号：US09434170
申请日：1999-11-04
申请人： Byoung Yoon Kim , Jong Bum Hong , Young Bae Yeo , Bong Wan Lee
发明人： Byoung Yoon Kim , Jong Bum Hong , Young Bae Yeo , Bong Wan Lee
IPC分类号： G01C1972
CPC分类号： G01C19/72
摘要： A fiber-optic laser gyroscope having phase sensitive detecting means which can reduce rotation rate measurement errors. In the fiber-optic laser gyroscope, errors due to the relative intensity difference between two consecutive pulses, which was an error factor in rotation rate measurement through time interval measurement between two adjacent pulses, can be eliminated by having a phase sensitive detection means which may extract and detect only components having the same phase as that of a phase-modulated signal from components having the same frequency as that of a phase-modulated signal. An output from the phase sensitive detecting means has an additional characteristic of being linearly proportional to rotation rate. The fiber-optic laser gyroscope of the present invention, therefore, has a characteristic of a relatively simple signal processing compared to conventional interferometric fiber gyroscopes.
摘要翻译：具有相位敏感检测装置的光纤激光陀螺仪可以降低旋转速率的测量误差。在光纤激光陀螺仪中，通过两相邻脉冲之间的时间间隔测量的旋转速率测量中的误差因子，可以消除由于两个相邻脉冲之间的相对强度差引起的误差，具有相敏检测装置，从具有与相位调制信号的频率相同的频率的分量中仅提取和检测与相位调制信号具有相同相位的分量。来自相敏检测装置的输出具有与旋转速率成线性比例的附加特性。因此，与传统的干涉光纤陀螺仪相比，本发明的光纤激光陀螺仪具有比较简单的信号处理的特征。

10. 发明授权

US06654121B1 Apparatus and method for detecting polarization 有权
标题翻译：用于检测极化的装置和方法
公开(公告)号：US06654121B1
公开(公告)日：2003-11-25
申请号：US09913123
申请日：2001-08-08
申请人： Ho Jin Jeong , Bong Wan Lee
发明人： Ho Jin Jeong , Bong Wan Lee
IPC分类号： G01J400
CPC分类号： G01J4/04
摘要： An apparatus and method for detecting the state of polarization (SOP). The apparatus of the present invention includes a phase retarder and a polarizer which rotate with different speeds. In the method of the present invention, optical signals passed through the rotating phase retarder and the rotating polarizer are detected and their harmonic components related to rotating frequencies of phase retarder and polarizer are analyzed, which gives the Stokes parameters representing the state of polarization. According to the present invention, the amount of phase retardation at the phase retarder can be obtained together with the state of polarization using frequency component analysis, reducing measurement errors. The present invention has advantages in SOP measurement of wide wavelength range, increasing the measurement accuracy.
摘要翻译：用于检测偏振状态（SOP）的装置和方法。本发明的装置包括以不同速度旋转的相位延迟器和偏振器。在本发明的方法中，检测通过旋转相位延迟器和旋转偏振器的光信号，并分析与相位延迟器和偏振器的旋转频率相关的谐波分量，这给出了表示极化状态的斯托克斯参数。根据本发明，通过使用频率分量分析，可以与极化状态一起获得相位延迟器的相位延迟量，减少了测量误差。本发明在宽波长范围的SOP测量中具有优点，提高了测量精度。

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