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    • 1. 发明授权
    • All-optical AM-to-FM up-conversion for radio-over-fiber
    • 用于无线电光纤的全光AM-to-FM上变频
    • US08861969B2
    • 2014-10-14
    • US12377586
    • 2007-08-13
    • Sze-Chun ChanSheng-Kwang HwangJia-Ming Liu
    • Sze-Chun ChanSheng-Kwang HwangJia-Ming Liu
    • H04B10/00H04B10/08H04J14/04H04J14/00H04B10/04H04B10/29H04B10/2575
    • H04B10/25752H04B10/29
    • A laser source is configured for all-optical AM-FM up-conversion. In one exemplary embodiment, an amplitude modulated (AM) optical input signal containing a baseband signal at a sub-microwave frequency, is injected into the laser source. The amplitude of the AM optical input signal and the optical carrier frequency are adjusted so as to place the laser source in a period-one dynamical state characterized by a transitioning of the laser source from a free-running optical frequency to at least two optical frequencies having a separation distance equal to a period-one microwave frequency. As a result of the period-one dynamical state, a frequency modulated (FM) optical output signal containing the baseband signal carried at the period-one microwave frequency, is propagated out of the laser source. The period-one microwave frequency is operative as a sub-carrier signal.
    • 激光源配置为全光AM-FM上变频。 在一个示例性实施例中,将包含亚微波频率的基带信号的调幅(AM)光输入信号注入到激光源中。 调整AM光输入信号和光载波频率的振幅,以便将激光源放置在特征在于将激光源从自由运行的光频转换到至少两个光频率的周期一动态 具有等于​​一周期微波频率的间隔距离。 作为周期一动态的结果,包含在一个微波频率下携带的基带信号的调频(FM)光输出信号从激光源传播出去。 周期一微波频率作为副载波信号工作。
    • 2. 发明申请
    • ANALOG VARIABLE-FREQUENCY CONTROLLER AND SWITCHING CONVERTER THEREWITH
    • 模拟可变频率控制器和开关转换器
    • US20100134079A1
    • 2010-06-03
    • US12553383
    • 2009-09-03
    • Jia-Ming LIUYeong-Chau KuoTai-Haur Kuo
    • Jia-Ming LIUYeong-Chau KuoTai-Haur Kuo
    • G05F1/10
    • H02M3/156H02M2001/0032Y02B70/16
    • An analog variable-frequency controller includes a first current generator, a second current generator, a clock generator and a light/heavy load selector. The first and second current generator receive a load current signal and then output a first voltage signal and a second voltage signal, respectively. The clock generator generates a corresponding switching frequency according to the first voltage signal or the second voltage signal. The light/heavy load selector, connected with the first current generator, the second current generator and the clock generator, receives a control signal for controlling the clock generator to receive the first voltage signal or the second voltage signal. The abovementioned controller is implemented by an analog circuit, which has a lower circuit complexity, lower cost and is easy to be integrated into a switching converter.
    • 模拟可变频率控制器包括第一电流发生器,第二电流发生器,时钟发生器和轻/重负载选择器。 第一和第二电流发生器接收负载电流信号,然后分别输出第一电压信号和第二电压信号。 时钟发生器根据第一电压信号或第二电压信号产生相应的开关频率。 与第一电流发生器,第二电流发生器和时钟发生器连接的轻/重负载选择器接收用于控制时钟发生器的控制信号以接收第一电压信号或第二电压信号。 上述控制器由模拟电路实现,模拟电路具有较低的电路复杂度,较低的成本,易于集成到开关转换器中。
    • 5. 发明授权
    • Titanyl phthalocyanine, method for production thereof and electrophotographic photoreceptor containing the same
    • 酞菁钛,其制备方法和含有它的电子照相感光体
    • US06284420B1
    • 2001-09-04
    • US09492872
    • 2000-01-26
    • Jia-Ming LiuKuo-Tung HuangChiang-Yun LeeMei-Tyz PengCheng-Chi WangRong-Ming Ke
    • Jia-Ming LiuKuo-Tung HuangChiang-Yun LeeMei-Tyz PengCheng-Chi WangRong-Ming Ke
    • G03G1502
    • C09B67/0026C09B67/0016G03G5/0696
    • A peroxide-modified titanyl phthalocyanine for use in preparing charge generating layer of a photoreceptor is disclosed. The peroxide-modified titanyl phthalocyanine is obtained by subjecting titanyl phthalocyanine to a peroxide-induced complexation-mediated crystal transformation at a low temperature. The peroxide-modified titanyl phthalocyanine is characterized by having Bragg diffraction angles of 7.3, 9.4, 14.0, 24.1, 25.7, 27.2 and 28.5 degrees, and vibrational absorption resonances at 1486 cm (superscript: −1), 1420 cm (superscript: −1), 1134 cm (superscript: −1), 1078 cm (superscript: −1), 966 cm (superscript: −1), 900 cm (superscript: −1), 762 cm (superscript: −1) and 736 cm (superscript: −1). The photoreceptor exhibits excellent photosensitivity at wavelengths in the near-infrared range and has a unique crystal form, especially the peroxide-modified titanyl phthalocyanine shows a higher distinct absorption peak at the wavelength of 780 nm.
    • 公开了用于制备感光体的电荷产生层的过氧化物修饰的氧钛酞菁。 过氧化物修饰的氧钛酞菁通过在低温下经过氧化钛诱导的络合介导的晶体转变而得到。 过氧化物修饰的氧钛酞菁的特征在于布拉格衍射角为7.3,9.4,14.0,24.1,25.7,27.2和28.5度,1486cm(上标:-1),1420cm(上标:-1)的振动吸收共振 ),1134cm(上标:-1),1078cm(上标:-1),966cm(上标:-1),900cm(上标:-1),762cm(上标:-1)和736cm 上标:-1)。 感光体在近红外范围的波长处表现出优异的光敏性,并且具有独特的晶体形式,特别是过氧化物修饰的氧钛酞菁在780nm波长处显示出更高的不同吸收峰。
    • 7. 发明授权
    • Analog variable-frequency controller and switching converter therewith
    • 模拟变频控制器和开关变换器
    • US07923975B2
    • 2011-04-12
    • US12553383
    • 2009-09-03
    • Jia-Ming LiuYeong-Chau KuoTai-Haur Kuo
    • Jia-Ming LiuYeong-Chau KuoTai-Haur Kuo
    • G05F1/613G05F1/00
    • H02M3/156H02M2001/0032Y02B70/16
    • An analog variable-frequency controller includes a first current generator, a second current generator, a clock generator and a light/heavy load selector. The first and second current generator receive a load current signal and then output a first voltage signal and a second voltage signal, respectively. The clock generator generates a corresponding switching frequency according to the first voltage signal or the second voltage signal. The light/heavy load selector, connected with the first current generator, the second current generator and the clock generator, receives a control signal for controlling the clock generator to receive the first voltage signal or the second voltage signal. The abovementioned controller is implemented by an analog circuit, which has a lower circuit complexity, lower cost and is easy to be integrated into a switching converter.
    • 模拟可变频率控制器包括第一电流发生器,第二电流发生器,时钟发生器和轻/重负载选择器。 第一和第二电流发生器接收负载电流信号,然后分别输出第一电压信号和第二电压信号。 时钟发生器根据第一电压信号或第二电压信号产生对应的开关频率。 与第一电流发生器,第二电流发生器和时钟发生器连接的轻/重负载选择器接收用于控制时钟发生器的控制信号以接收第一电压信号或第二电压信号。 上述控制器由模拟电路实现,模拟电路具有较低的电路复杂度,较低的成本,易于集成到开关转换器中。
    • 8. 发明授权
    • Fast polarization-switchable semiconductor lasers
    • 快速偏振切换半导体激光器
    • US4612645A
    • 1986-09-16
    • US683776
    • 1984-12-19
    • Jia-Ming LiuYing-Chih Chen
    • Jia-Ming LiuYing-Chih Chen
    • H01S5/062H01S5/32H01S5/323H01S3/19
    • H01S5/06209H01S5/32H01S5/06236H01S5/3201H01S5/32391
    • The laser device of the present invention comprises: a semiconductor substrate; a first cladding layer of semiconductor formed on the substrate; an active layer of semiconductor formed on the first cladding layer, thereby forming a junction plane between the active layer and the first cladding layer; a second cladding layer of semiconductor formed on the active layer and a cap layer of semiconductor formed on the second cladding layer; the active layer having a lattice constant parallel to the junction plane sufficiently larger than the lattice constant normal to the junction plane so as to increase the optical gain of the TM mode relative to the optical gain of the normally operating TE mode, such that at a first injection current level, the laser device operates in the TM mode and at a second injection current level, the laser device operates in the TE mode. The laser output of the laser device of the present invention can be switched between a pure TM mode and a pure TE mode with nanosecond response time by varying injection current levels of the device.
    • 本发明的激光装置包括:半导体基板; 形成在所述基板上的第一半导体包层; 形成在所述第一包层上的有源层半导体,从而在所述有源层与所述第一包层之间形成接合面; 形成在有源层上的第二半导体层和形成在第二覆层上的半导体帽层; 所述有源层具有平行于所述结面的晶格常数,其足够大于垂直于所述结面的晶格常数,从而相对于所述正常工作的TE模的光学增益增加所述TM模的光学增益,使得在 第一注入电流水平,激光器件以TM模式工作,并且在第二注入电流水平下操作,激光器件以TE模式工作。 本发明的激光装置的激光输出可以通过改变装置的注入电流水平,在纯TM模式和纯TE模式之间通过纳秒响应时间进行切换。