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1.发明申请公开(公告)号：US20220278754A1
公开(公告)日：2022-09-01
申请号：US17681623
申请日：2022-02-25
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
IPC: H04B10/54 , H04B10/50 , H04B10/556
Abstract: An apparatus for generating a time-delayed product of two independent signals includes a fixed-wavelength laser. A first optical modulator is optically coupled to the fixed-wavelength laser and configured to modulate a fixed wavelength optical carrier with a first input signal of a set of input signals. The apparatus also includes a tunable laser. A second optical modulator is optically coupled to the tunable laser and configured to modulate a tunable optical carrier with a second input signal of the set of input signals. The apparatus also includes a dispersive element coupled to the second optical modulator, a first optical detector coupled to the dispersive element, a third optical modulator optically coupled to the first optical detector and the first optical modulator, an optical 90-degree hybrid element optically coupled to the third optical modulator, and a plurality of optical detectors optically coupled to the optical 90-degree hybrid element.
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公开(公告)号：US20220239054A1
公开(公告)日：2022-07-28
申请号：US17582312
申请日：2022-01-24
Applicant: RAM Photonics, LLC
Inventor： John R. Marciante
Abstract: A multi-wavelength laser system includes a first fiber laser having a first cavity mirror and a first output coupler, a first optical coupler configured to receive light from the first output coupler, a second fiber laser having a second cavity mirror and a second output coupler, and a second optical coupler configured to receive light from the second output coupler. The multi-wavelength laser system also includes a spectral beam combiner configured to receive first output light from the first optical coupler, receive second output light from the second optical coupler, combine the first output light and the second output light, and form a multi-wavelength output beam.
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公开(公告)号：US11137627B2
公开(公告)日：2021-10-05
申请号：US16236038
申请日：2018-12-28
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
Abstract: An apparatus for generating a set of spectral correlation coefficients of an input signal includes: a master laser configured to generate an optical frequency comb signal; a first optical modulator configured to modulate the optical frequency comb signal with an input signal to generate a plurality of spectral copies of the input signal; a dispersive element configured to delay the plurality of spectral copies of the input signal by a wavelength-dependent time delay; a second optical modulator configured to modulate the delayed plurality of spectral copies with a conjugate of the input signal; and an optical comb filter configured to integrate the conjugate modulated plurality of spectral copies of the input signal to generate a set of cyclic autocorrelation coefficients.
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公开(公告)号：US10551626B2
公开(公告)日：2020-02-04
申请号：US15272686
申请日：2016-09-22
Applicant: RAM Photonics, LLC
Inventor： John R. Marciante
Abstract: A multispectral beam combiner includes a prism body having an output surface, a fiber entry block attached to the prism body, and a plurality of input fibers attached to the fiber entry block. Each of the plurality of input fibers is operable to support a different wavelength. The multispectral beam combiner also includes a collimator attached to the prism body. The collimator is operable to reflect and collimate light propagating from the fiber entry block. The multispectral beam combiner further includes an immersion grating operable to diffract light propagating from the collimator. The output surface of the prism body is operable to pass light propagating from the immersion grating.
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公开(公告)号：US20190339548A1
公开(公告)日：2019-11-07
申请号：US16236038
申请日：2018-12-28
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
IPC: G02F1/01
Abstract: An apparatus for generating a set of spectral correlation coefficients of an input signal includes: a master laser configured to generate an optical frequency comb signal; a first optical modulator configured to modulate the optical frequency comb signal with an input signal to generate a plurality of spectral copies of the input signal; a dispersive element configured to delay the plurality of spectral copies of the input signal by a wavelength-dependent time delay; a second optical modulator configured to modulate the delayed plurality of spectral copies with a conjugate of the input signal; and an optical comb filter configured to integrate the conjugate modulated plurality of spectral copies of the input signal to generate a set of cyclic autocorrelation coefficients.
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Patent Agency Ranking
公开(公告)号：US20160216592A1
公开(公告)日：2016-07-28
申请号：US14974911
申请日：2015-12-18
Applicant: RAM Photonics, LLC
Inventor： Ping Piu KUO
CPC classification number: G02F1/353 , G02B6/00 , G02F1/07 , G02F1/3534 , G02F1/3536 , G02F1/39 , G02F2203/56 , H01S3/0092
Abstract: Embodiments of the invention provide apparatuses and methods for phase correlated seeding of parametric mixer and for generating coherent frequency combs. The parametric mixer may use two phase-correlated optical waves with different carrier frequencies to generate new optical waves centered at frequencies differing from the input waves, while retaining the input wave coherent properties. In the case when parametric mixer is used to generate frequency combs with small frequency pitch, the phase correlation of the input (seed) waves can be achieved by electro-optical modulator and a single master laser. In the case when frequency comb possessing a frequency pitch that is larger than frequency modulation that can be affected by electro-optic modulator, the phase correlation of the input (seed) waves is achieved by combined use of an electro-optical modulator and injection locking to a single or multiple slave lasers.
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公开(公告)号：US09244330B2
公开(公告)日：2016-01-26
申请号：US14311054
申请日：2014-06-20
Applicant: RAM Photonics, LLC
Inventor： Ping Piu Kuo
CPC classification number: G02F1/353 , G02B6/00 , G02F1/07 , G02F1/3534 , G02F1/3536 , G02F1/39 , G02F2203/56 , H01S3/0092
Abstract: Embodiments of the invention provide apparatuses and methods for phase correlated seeding of parametric mixer and for generating coherent frequency combs. The parametric mixer may use two phase-correlated optical waves with different carrier frequencies to generate new optical waves centered at frequencies differing from the input waves, while retaining the input wave coherent properties. In the case when parametric mixer is used to generate frequency combs with small frequency pitch, the phase correlation of the input (seed) waves can be achieved by electro-optical modulator and a single master laser. In the case when frequency comb possessing a frequency pitch that is larger than frequency modulation that can be affected by electro-optic modulator, the phase correlation of the input (seed) waves is achieved by combined use of an electro-optical modulator and injection locking to a single or multiple slave lasers.
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公开(公告)号：US20150300885A1
公开(公告)日：2015-10-22
申请号：US14587392
申请日：2014-12-31
Applicant: RAM Photonics, LLC
Inventor： Seung-Whan Bahk
IPC: G01J9/02
CPC classification number: G01J9/0215 , G01B9/02 , G01J9/02 , G01J2009/002 , G03F7/706
Abstract: A method of measuring characteristics of a wavefront of an incident beam includes obtaining an interferogram associated with the incident beam passing through a transmission mask and Fourier transforming the interferogram to provide a frequency domain interferogram. The method also includes selecting a subset of harmonics from the frequency domain interferogram, individually inverse Fourier transforming each of the subset of harmonics to provide a set of spatial domain harmonics, and extracting a phase profile from each of the set of spatial domain harmonics. The method further includes removing phase discontinuities in the phase profile, rotating the phase profile, and reconstructing a phase front of the wavefront of the incident beam.
Abstract translation: 测量入射光束的波前特性的方法包括获得与通过透射掩模的入射光束相关联的干涉图，并对干涉图进行傅里叶变换以提供频域干涉图。 该方法还包括从频域干涉图中选择一个谐波子集，单独逆傅里叶变换谐波子集中的每一个以提供一组空间域谐波，以及从该组空间域谐波中的每一个提取相位分布。 该方法还包括去除相位分布中的相位不连续性，旋转相位分布，以及重建入射光束的波前的相位前沿。
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9.发明申请公开(公告)号：US20140178020A1
公开(公告)日：2014-06-26
申请号：US13886821
申请日：2013-05-03
Applicant: RAM PHOTONICS, LLC
Inventor： Ping Piu Kuo , Yauheni Myslivets
IPC: G02B6/00
CPC classification number: G02B6/00 , G02B6/02247 , G02F1/353 , G02F1/383 , G02F1/39 , G02F2201/16 , G02F2203/26 , G02F2203/56
Abstract: An optical device for generating a frequency comb includes an optical source and a first waveguide comprising a nonlinear optical medium operable to mix at least two input optical waves to generate a plurality of first optical waves. The optical device also includes a second waveguide concatenated to the first waveguide and characterized by a first dispersion characteristics and operable to compress the waveforms of the plurality of first optical waves and to reduce a frequency chirp introduced by the first waveguide. The optical device additionally includes a third waveguide concatenated to the second waveguide. The third waveguide comprises a nonlinear optical medium and is operable to mix the plurality of first optical waves to generate a plurality of second optical waves and to increase a total number of second optical waves with respect to a total number of first optical waves.
Abstract translation: 用于产生频率梳的光学装置包括光源和包括可操作以混合至少两个输入光波以产生多个第一光波的非线性光学介质的第一波导。 光学装置还包括连接到第一波导的第二波导，其特征在于第一色散特性并且可操作以压缩多个第一光波的波形并且减少由第一波导引入的频率啁啾。 光学装置还包括连接到第二波导的第三波导。 第三波导包括非线性光学介质，并且可操作以混合多个第一光波以产生多个第二光波，并且相对于第一光波的总数增加第二光波的总数。
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公开(公告)号：US11892347B2
公开(公告)日：2024-02-06
申请号：US17716818
申请日：2022-04-08
Applicant: RAM Photonics, LLC
Inventor： Per Adamson , Mike Cinquino , Joseph Lawson , Jordan Leidner
CPC classification number: G01J1/0252 , G01J1/4257
Abstract: A system for determining the profile of a laser beam includes a detector having a thermochromic liquid crystal film (TLCF) in thermal communication with a heat spreader and a thermoelectric cooler. The liquid crystal film has a thermochromic response such that heating of the film by a received laser beam creates a detectable color response at the film. The system also includes an image sensor and a controller configured to output an operating current for the TEC and receive images from the sensor. The system can selectively vary the temperature set point of the TEC to change the steady state temperature of the TLCF to examine the full intensity profile of the received beam even when the temperature response bandwidth of the TLCF is too narrow to display the full beam profile in a single color spot.
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