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    • 2. 发明授权
    • Parallel optical sampler
    • 并行光采样器
    • US08730562B1
    • 2014-05-20
    • US13292861
    • 2011-11-09
    • Anna Tauke-PedrettiErik J. SkogenGregory A. Vawter
    • Anna Tauke-PedrettiErik J. SkogenGregory A. Vawter
    • G02F2/00H01S5/00
    • G02F7/00H03M1/1215H03M1/1245
    • An optical sampler includes a first and second 1×n optical beam splitters splitting an input optical sampling signal and an optical analog input signal into n parallel channels, respectively, a plurality of optical delay elements providing n parallel delayed input optical sampling signals, n photodiodes converting the n parallel optical analog input signals into n respective electrical output signals, and n optical modulators modulating the input optical sampling signal or the optical analog input signal by the respective electrical output signals, and providing n successive optical samples of the optical analog input signal. A plurality of output photodiodes and eADCs convert the n successive optical samples to n successive digital samples. The optical modulator may be a photodiode interconnected Mach-Zehnder Modulator. A method of sampling the optical analog input signal is disclosed.
    • 光采样器包括分别将输入光采样信号和光模拟输入信号分别分成n个并行通道的第一和第二1×n光束分离器,提供n个并行延迟输入光采样信号的多个光延迟元件,n个光电二极管 将n个并行光模拟输入信号转换成n个相应的电输出信号,以及n个光调制器,通过相应的电输出信号调制输入光采样信号或光模拟输入信号,并提供光模拟输入信号的n个连续的光采样 。 多个输出光电二极管和eADC将n个连续的光学样本转换成n个连续的数字采样。 光调制器可以是光电二极管连接的马赫 - 曾德调制器。 公开了一种采样光模拟输入信号的方法。
    • 4. 发明授权
    • Optical NAND gate
    • 光NAND门
    • US07995877B1
    • 2011-08-09
    • US12182683
    • 2008-07-30
    • Erik J. SkogenJames RaringAnna Tauke-Pedretti
    • Erik J. SkogenJames RaringAnna Tauke-Pedretti
    • G02B6/12
    • G02F1/01708B82Y20/00G02B2006/12078G02B2006/12128H01L27/0605H03K19/017536
    • An optical NAND gate is formed from two pair of optical waveguide devices on a substrate, with each pair of the optical waveguide devices consisting of an electroabsorption modulator and a photodetector. One pair of the optical waveguide devices is electrically connected in parallel to operate as an optical AND gate; and the other pair of the optical waveguide devices is connected in series to operate as an optical NOT gate (i.e. an optical inverter). The optical NAND gate utilizes two digital optical inputs and a continuous light input to provide a NAND function output. The optical NAND gate can be formed from III-V compound semiconductor layers which are epitaxially deposited on a III-V compound semiconductor substrate, and operates at a wavelength in the range of 0.8-2.0 μm.
    • 光与非门由基板上的两对光波导器件形成,每对光波导器件由电吸收调制器和光检测器组成。 一对光波导器件并联电连接以用作光学AND门; 并且另一对光波导器件串联连接以用作光学非门(即,光逆变器)。 光与非门利用两个数字光输入和连续光输入来提供NAND功能输出。 光与非门可以由外延沉积在III-V化合物半导体衬底上的III-V族化合物半导体层形成,并且在0.8-2.0μm的范围内工作。
    • 5. 发明授权
    • Optical set-reset latch
    • 光学设置复位锁存器
    • US08363990B1
    • 2013-01-29
    • US13071095
    • 2011-03-24
    • Erik J. Skogen
    • Erik J. Skogen
    • G02B6/12G02B6/13G02F1/035
    • H03K3/42B82Y20/00G02F1/015G02F1/01708G02F1/01725G02F3/00G02F2001/0157G02F2001/0158G02F2001/0175H01L27/15H01S5/0265H03K19/14
    • An optical set-reset (SR) latch is formed from a first electroabsorption modulator (EAM), a second EAM and a waveguide photodetector (PD) which are arranged in an optical and electrical feedback loop which controls the transmission of light through the first EAM to latch the first EAM in a light-transmissive state in response to a Set light input. A second waveguide PD controls the transmission of light through the second EAM and is used to switch the first EAM to a light-absorptive state in response to a Reset light input provided to the second waveguide PD. The optical SR latch, which may be formed on a III-V compound semiconductor substrate (e.g. an InP or a GaAs substrate) as a photonic integrated circuit (PIC), stores a bit of optical information and has an optical output for the logic state of that bit of information.
    • 光学设置复位(SR)锁存器由第一电吸收调制器(EAM),第二EAM和波导光电检测器(PD)形成,该第一电吸收调制器(EAM),第二EAM和波导光电检测器(PD)被布置在控制通过第一EAM的光传输光 以响应于设置光输入而将第一EAM锁定在透光状态。 第二波导PD控制通过第二EAM的光的透射,并且用于响应于提供给第二波导PD的复位光输入而将第一EAM切换到光吸收状态。 可以形成在作为光子集成电路(PIC)的III-V化合物半导体衬底(例如InP或GaAs衬底)上的光学SR锁存器存储一位光学信息,并且具有用于逻辑状态的光学输出 的那一点信息。
    • 6. 发明授权
    • Optical analog-to-digital converter
    • 光模数转换器
    • US07564387B1
    • 2009-07-21
    • US12039931
    • 2008-02-29
    • G. Allen VawterJames RaringErik J. Skogen
    • G. Allen VawterJames RaringErik J. Skogen
    • H03M1/00
    • G02F7/00
    • An optical analog-to-digital converter (ADC) is disclosed which converts an input optical analog signal to an output optical digital signal at a sampling rate defined by a sampling optical signal. Each bit of the digital representation is separately determined using an optical waveguide interferometer and an optical thresholding element. The interferometer uses the optical analog signal and the sampling optical signal to generate a sinusoidally-varying output signal using cross-phase-modulation (XPM) or a photocurrent generated from the optical analog signal. The sinusoidally-varying output signal is then digitized by the thresholding element, which includes a saturable absorber or at least one semiconductor optical amplifier, to form the optical digital signal which can be output either in parallel or serially.
    • 公开了一种光学模拟 - 数字转换器(ADC),其以由采样光信号限定的采样速率将输入光模拟信号转换为输出光数字信号。 使用光波导干涉仪和光学阈值元件分别确定数字表示的每一位。 干涉仪使用光模拟信号和采样光信号,使用交叉相位调制(XPM)或从光模拟信号产生的光电流产生正弦变化的输出信号。 然后,正弦变化的输出信号由包括可饱和吸收器或至少一个半导体光放大器的阈值元件数字化,以形成可以并行或串行输出的光数字信号。