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    • 4. 发明授权
    • Motion induced elimination of dead band in a short pulse laser gyro
    • 运动引起消除短脉冲激光陀螺仪中的死区
    • US5367528A
    • 1994-11-22
    • US880802
    • 1992-05-08
    • Jean-Claude M. DielsMing Lai
    • Jean-Claude M. DielsMing Lai
    • G01C19/70H01S3/098
    • G01C19/70
    • A passively mode-locked laser gyro having a saturable absorber in constant motion. The saturable absorber is mechanically vibrated or rotated in a direction transverse to the longitudinal pulses passing through the absorber. The vibrational or rotational motion of the absorber dithers the effective scattering error source. The saturable absorber may be a multiple quantum well device. The multiple quantum well device may be attached to two dither drives to provide continuous circular motion of the multiple quantum well device. The motion generator can generate both linear and non-linear motion. The passively mode-locked laser qyro may be constructed from fiber optics with a bias modulator and gain medium.
    • 具有恒定运动的可饱和吸收体的被动锁模激光陀螺仪。 可饱和吸收器在横向于穿过吸收器的纵向脉冲的方向上机械振动或旋转。 吸收体的振动或旋转运动使有效的散射误差源抖动。 可饱和吸收体可以是多量子阱装置。 多量子阱器件可以附接到两个抖动驱动器以提供多量子阱器件的连续的圆周运动。 运动发生器可以产生线性和非线性运动。 被动锁模激光陀螺可以由具有偏置调制器和增益介质的光纤构成。
    • 5. 发明授权
    • Mode-locked active gyro solid state lasers
    • 锁模有源陀螺固态激光器
    • US5363192A
    • 1994-11-08
    • US722754
    • 1991-06-28
    • Jean-Claude M. DielsMichael L. Dennis
    • Jean-Claude M. DielsMichael L. Dennis
    • G01C19/66H01S3/083H01S5/10H01S3/10
    • G01C19/66H01S3/083H01S5/1071
    • A ring laser gyro that minimizes and avoids the effects of lock-in and backscatter. A ring laser is pumped in a lasing cavity with a mode-locked laser. Dual counterrotating pumped pulses are precisely positioned to avoid overlay in optical elements that contribute to lock-in and backscatter. The position of the stimulated counter rotating laser beams is controlled by two methods. In the first method the pumped pulses are synchronized with a wave propagation delay line. In the second method the pumped pulses are chopped by an acousto-optic modulator shutter to precisely time the location of the pumped pulses. Both methods are can be combined to achieve a hybrid synchronized and acousto-optic modulated approach.
    • 环形激光陀螺仪,可最大限度地减少并避免锁定和反向散射的影响。 环形激光器通过锁模激光器在激光腔中泵送。 双反向泵浦脉冲被精确定位以避免有助于锁定和反向散射的光学元件中的覆盖。 受激反相激光束的位置由两种方法控制。 在第一种方法中,泵浦脉冲与波传播延迟线同步。 在第二种方法中,泵浦脉冲被声光调制器快门切断,以精确地计时泵浦脉冲的位置。 两种方法都可以组合起来实现混合同步和声光调制方法。
    • 6. 发明授权
    • Resonant cavity dither with index of refraction modulator
    • 具有折射率调制器的谐振腔抖动
    • US5251230A
    • 1993-10-05
    • US880426
    • 1992-05-08
    • Ming LaiJean-Claude M. Diels
    • Ming LaiJean-Claude M. Diels
    • G01C19/66H01S3/083
    • G01C19/665
    • A laser gyro having a laser source for providing laser energy includes a laser gain device for receiving lasing energy and generating first and second counterpropagating laser pulses along a common optical path. A detector detects at least one of the pulses and generates an index of refraction control signal representative of the detected at least one laser pulse. The index of refraction of a segment of the optical path is varied in response to the index of refraction control signal such that the index of refraction of the segment of the optical path changes an optical path length for one of the laser pulses. A detector senses the beatnote between the first and second counterpropagating laser pulses.
    • 具有用于提供激光能量的激光源的激光陀螺仪包括用于接收激光能量并沿公共光路产生第一和第二反向传播激光脉冲的激光增益器件。 检测器检测至少一个脉冲并产生代表检测到的至少一个激光脉冲的折射率控制信号。 光路部分的折射率响应于折射率控制信号而变化,使得光路段的折射率改变激光脉冲之一的光程长度。 检测器感测第一和第二反向传播激光脉冲之间的搏动。
    • 7. 发明授权
    • Fourier moire wavefront sensor
    • 傅立叶波纹波前传感器
    • US06717661B1
    • 2004-04-06
    • US09771303
    • 2001-01-26
    • Aaron C. BernsteinJean-Claude M. Diels
    • Aaron C. BernsteinJean-Claude M. Diels
    • G01J100
    • G01J9/02
    • An apparatus and method for wavefront sensing that includes: employing two moiré gratings in an optical path; optically Fourier transforming a moiré deflectogram produced by the gratings; variably transmitting the transformed moiré deflectogram; and receiving an image of the variably transmitted and transformed moiré deflectogram. The variable transmission is best accomplished by transmission filter, a transmissive optic encoding intensity information upon the moiré deflectogram as a function of fringe angle. For example, the function can be a triangular transmission function centered on the (0,0) order spatial frequency spot and oriented at 45 degrees to the y-axis. The optical Fourier transform is accomplished by a lens and the variable transmission by an apodized slit.
    • 一种用于波前感测的装置和方法,包括:在光路中采用两个莫尔光栅; 光学傅立叶变换由光栅产生的莫尔偏转图; 可变地传输变形的莫尔偏转图; 并接收可变发射和变换的莫尔偏转图的图像。 可变传输最好通过传输滤波器来实现,传输滤波器是基于莫尔偏转图作为边缘角的函数的透射光学编码强度信息。 例如,该函数可以是以(0,0)阶空间频率点为中心并以与y轴成45度取向的三角形传递函数。 光学傅立叶变换由透镜和可变透镜通过变迹缝完成。
    • 8. 发明授权
    • Broadband ultrashort pulse measuring device using non-linear electronic
components
    • 宽带超短脉冲测量装置采用非线性电子元器件
    • US6025911A
    • 2000-02-15
    • US555717
    • 1995-11-14
    • Scott A. DiddamsJean-Claude M. DielsPrien Steffen
    • Scott A. DiddamsJean-Claude M. DielsPrien Steffen
    • G01J11/00G01B9/02
    • G01J11/00
    • A measuring device completely determines the characteristics of light pulses in a beam of ultrashort light pulses using optoelectronic detectors instead of second harmonic generating crystals. An optical system provides a spatial dispersion of an ultrashort pulse in at least one dimension. A two slit filter intercepts the dispersed beam whereby the transmitted spectra combine to provide a beat frequency within selected limits. An optoelectronic detector detects the beat frequency and outputs a signal functionally related to the beat frequency that contains spectral phase information that is sufficient to characterize the pulse. In another embodiment, a beam splitter splits the beam into first and second beams, wherein one of the beams is time delayed and the other beam is spectrally dispersed. The two beam are recombined to provide information about the spectral phase of the ultrashort pulse. The pulse is completely characterized when the spectral phase information is combined with amplitude information.
    • 测量装置使用光电检测器而不是二次谐波产生晶体完全确定超短光脉冲束中的光脉冲的特性。 光学系统在至少一个维度上提供超短脉冲的空间色散。 两个狭缝滤波器拦截分散的光束,由此传输的光谱结合在一起提供了选定极限内的拍频。 光电检测器检测拍频,并输出功能上与拍频相关的信号,该信号包含足以表征脉冲的光谱相位信息。 在另一个实施例中,分束器将光束分裂成第一和第二光束,其中光束之一被延时并且另一束光谱分散。 两个光束被重组以提供关于超短脉冲的光谱相位的信息。 当频谱相位信息与幅度信息组合时,脉冲被完全表征。
    • 9. 发明授权
    • Solid state laser gyro with interferometrically substracted noise
    • 固态激光陀螺仪具有干涉消除噪声
    • US5191390A
    • 1993-03-02
    • US723367
    • 1991-06-28
    • Jean-Claude M. DielsMing Lai
    • Jean-Claude M. DielsMing Lai
    • G01C19/66H01S5/10
    • G01C19/66H01S5/1071
    • A ring laser apparatus for spontaneous-emission-free detection including several mirrors. Some of the mirrors including a first, second and third mirror are arranged to form a laser ring. A gain medium is located between two of the first, second and third mirrors within the laser ring. Radiation from an external radiation source impinges on a fourth mirror and is reflected to illuminate the gain medium. The gain medium thereby produces first and second oppositely traveling laser beams along first and second pathways, each of the pathways having equal path lengths. The first and second oppositely traveling beams each provide an output through one of the laser ring mirrors and are reflected into the beam splitter after respectively striking fifth and sixth mirrors. The gain medium comprises a gain layer having a thickness which is much smaller than a wavelength so that the oppositely directed first and second beams from the gain medium are highly coherent on the beam splitter. The beam splitter operates on the first and second oppositely traveling beams so as to provide a detection signal free of spontaneous emission noise to the detector.
    • 一种用于自发发射检测的环形激光装置,包括几个反射镜。 一些包括第一,第二和第三反射镜的反射镜被布置成形成激光环。 增益介质位于激光环内的第一,第二和第三反射镜的两个之间。 来自外部辐射源的辐射照射在第四反射镜上并被反射以照亮增益介质。 增益介质由此沿着第一和第二路径产生第一和第二相对行进的激光束,每个路径具有相等的路径长度。 第一和第二相对移动的光束各自通过一个激光环形反射镜提供输出,并且在分别撞击第五和第六反射镜之后被反射到分束器中。 增益介质包括具有比波长小得多的厚度的增益层,使得来自增益介质的相反方向的第一和第二波束在分束器上是高度一致的。 分束器在第一和第二相对移动的光束上操作,以便向检测器提供没有自发发射噪声的检测信号。