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公开(公告)号：US20220100008A1
公开(公告)日：2022-03-31
申请号：US17467887
申请日：2021-09-07
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：US11005520B2
公开(公告)日：2021-05-11
申请号：US16931739
申请日：2020-07-17
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
IPC: H04B1/7075 , H04B1/7085 , H04J14/02 , H04L7/00 , H04B10/61 , H04B1/69
Abstract: A code acquisition module for a direct sequence spread spectrum (DSSS) receiver includes: a Sparse Discrete Fourier transform (SDFT) module configured to perform an SDFT on a finite number of non-uniformly distributed frequencies comprising a preamble of a received DSSS frame to calculate Fourier coefficients for the finite number of non-uniformly distributed frequencies; a multiplier configured to multiply the Fourier coefficients for the finite number of non-uniformly distributed frequencies of the received DSSS frame by complex conjugate Fourier coefficients for the finite number of non-uniformly distributed frequencies to generate a cross-correlation of the received DSSS frame and the complex conjugate Fourier coefficients; and a filter module configured to input the cross-correlation and output a delay estimation for the received DSSS frame.
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公开(公告)号：US09921111B2
公开(公告)日：2018-03-20
申请号：US15209535
申请日：2016-07-13
Applicant: RAM Photonics, LLC
Inventor： Seung-Whan Bahk
CPC classification number: G01J9/0215 , G01B9/02 , G01J9/02 , G01J2009/002 , G03F7/706
Abstract: A method for performing optical wavefront sensing includes providing an amplitude transmission mask having a light input side, a light output side, and an optical transmission axis passing from the light input side to the light output side. The amplitude transmission mask is characterized by a checkerboard pattern having a square unit cell of size Λ. The method also includes directing an incident light field having a wavelength λ to be incident on the light input side and propagating the incident light field through the amplitude transmission mask. The method further includes producing a plurality of diffracted light fields on the light output side and detecting, at a detector disposed a distance L from the amplitude transmission mask, an interferogram associated with the plurality of diffracted light fields. The relation 0
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公开(公告)号：US20170082863A1
公开(公告)日：2017-03-23
申请号：US15272686
申请日：2016-09-22
Applicant: RAM Photonics, LLC
Inventor： John R. Marciante
CPC classification number: G02B27/1006 , G02B17/086 , G02B27/30 , G02B27/4233 , H01S3/005 , H01S3/0675 , H01S3/07 , H01S3/08059 , H01S3/0812 , H01S3/0815 , H01S3/2391
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：US09528875B2
公开(公告)日：2016-12-27
申请号：US14635250
申请日：2015-03-02
Applicant: RAM PHOTONICS, LLC
Inventor： Ping Piu Kuo
IPC: G01J1/16 , G01J3/02 , G01J9/04 , H01S5/0687 , H01S5/40
CPC classification number: G01J1/16 , G01J3/02 , G01J9/04 , H01S5/0687 , H01S5/4087
Abstract: Embodiments of the invention provides methods and systems for synthesizing optical signals with high frequency stability. Using a set of external optical signal manipulators and control systems, embodiments of the invention enhance the resolution of any frequency reference and thereby alleviates the needs for ultra-high-Q cavities in frequency-stable optical signal synthesis. The invention consequently improves the performance of any optical signal generator by a substantial margin, while maintaining the system complexity and power dissipation at levels comparable to the original systems.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20150241271A1
公开(公告)日：2015-08-27
申请号：US14635250
申请日：2015-03-02
Applicant: RAM PHOTONICS, LLC
Inventor： Ping Piu Kuo
CPC classification number: G01J1/16 , G01J3/02 , G01J9/04 , H01S5/0687 , H01S5/4087
Abstract: Embodiments of the invention provides methods and systems for synthesizing optical signals with high frequency stability. Using a set of external optical signal manipulators and control systems, embodiments of the invention enhance the resolution of any frequency reference and thereby alleviates the needs for ultra-high-Q cavities in frequency-stable optical signal synthesis. The invention consequently improves the performance of any optical signal generator by a substantial margin, while maintaining the system complexity and power dissipation at levels comparable to the original systems.
Abstract translation: 本发明的实施例提供了用于合成具有高频稳定性的光信号的方法和系统。 使用一组外部光信号操纵器和控制系统，本发明的实施例增强了任何频率参考的分辨率，从而减轻了频率稳定的光信号合成中超高Q空腔的需要。 因此，本发明在任何光学信号发生器的性能上大幅度提高，同时将系统复杂性和功率耗散维持在与原始系统相当的水平。
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公开(公告)号：US20140133815A1
公开(公告)日：2014-05-15
申请号：US13886875
申请日：2013-05-03
Applicant: RAM PHOTONICS, LLC
Inventor： Ping Piu Kuo
IPC: G02B6/00
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.
Abstract translation: 本发明的实施例提供了用于参数混频器的相位相关播种和用于产生相干频率梳的装置和方法。 参数混频器可以使用具有不同载波频率的两个相位相关的光波，以产生以与输入波不同的频率为中心的新的光波，同时保持输入波相干特性。 在使用参数混频器来产生具有较小频率间距的频率梳的情况下，输入（种子）波的相位相关可以通过电光调制器和单个主激光器实现。 当频率梳具有比可以受电光调制器影响的频率调制大的频率间距时，通过组合使用电光调制器和注入锁定来实现输入（种子）波的相位相关 到单个或多个从属激光器。
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公开(公告)号：US12298562B2
公开(公告)日：2025-05-13
申请号：US17733319
申请日：2022-04-29
Applicant: RAM Photonics LLC
Inventor： Joseph Lawson , Jordan Leidner , Per Adamson
Abstract: Various embodiments and methods related to an optical fiber alignment system are provided herein. The optical fiber alignment system includes a controller and a rotation stage having a central axis, a first end, and a second end. The central axis extends from the first end to the second end of the rotation stage. The rotation stage includes an optical fiber channel extending from the first end of the rotation stage to the second end of the rotation stage and may be operationally coupled with the controller. The rotation stage is configured to rotate about the central axis of the rotation stage. The optical fiber alignment system includes a light source positioned to emit light onto the optical fiber channel at an oblique angle from the central axis of the rotation stage. The optical fiber alignment system includes an image sensor positioned adjacent to the second end of the rotation stage.
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公开(公告)号：US20220350080A1
公开(公告)日：2022-11-03
申请号：US17733323
申请日：2022-04-29
Applicant: RAM Photonics LLC
Inventor： Joseph Lawson , Jordan Leidner , Per Adamson
IPC: G02B6/255
Abstract: Various embodiments and methods relating to an optical fiber alignment and splicing system are described herein. The optical fiber alignment and splicing system includes a first rotation stage having a first central axis, a first end, and a second end, and a second rotation stage having a second central axis, a third end, and a fourth end. The first central axis extends from the first end to the second end of the first rotation stage, and the second central axis extends from the third end to the fourth end. The first rotation stage includes a first optical fiber channel extending from the first end of the first rotation stage to the second end of the first rotation stage, and the second rotation stage includes a second optical fiber channel extending from the third end of the second rotation stage to the fourth end of the second rotation stage.
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公开(公告)号：US20220286209A1
公开(公告)日：2022-09-08
申请号：US17681629
申请日：2022-02-25
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
IPC: H04B10/61 , H04B10/2575 , H04B10/50
Abstract: An apparatus includes a first antenna, a tunable optical carrier source, a second antenna, and a delay generation module coupled to the first antenna and the tunable optical carrier source. The apparatus also includes a fixed wavelength optical carrier source, an optical carrier generation module coupled to the fixed wavelength optical carrier source, and a local oscillator generation module. The apparatus further includes a correlative kernel generation and integration module coupled to the delay generation module and the local oscillator generation module and an optoelectronic conversion module coupled to the correlative kernel generation and integration module.
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