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公开(公告)号：US09593934B2
公开(公告)日：2017-03-14
申请号：US14175158
申请日：2014-02-07
Applicant: Axsun Technologies, Inc.
Inventor： Brian Goldberg , Dale C. Flanders , Walid A. Atia , Bartley C. Johnson , Mark E. Kuznetsov
CPC classification number: G01B9/02091 , A61B5/0066 , A61B5/0075 , G01N21/4795 , H01S5/02216 , H01S5/02248 , H01S5/02284 , H01S5/141 , H01S5/4012 , H01S5/4062 , H01S5/4068
Abstract: An optical coherence analysis system comprising: a first swept source that generates a first optical signal that is tuned over a first spectral scan band, a second swept source that generates a second optical signal that is tuned over a second spectral scan band, a combiner for combining the first optical signal and the second optical signal for form a combined optical signal, an interferometer for dividing the combined optical signal between a reference arm leading to a reference reflector and a sample arm leading to a sample, and a detector system for detecting an interference signal generated from the combined optical signal from the reference arm and from the sample arm. In embodiments, the swept sources are tunable lasers that have shared laser cavities.
Abstract translation: 一种光学相干分析系统，包括：第一扫描光源，其产生在第一光谱扫描带上调谐的第一光信号，产生在第二光谱扫描带上调谐的第二光信号的第二扫描光源， 组合第一光信号和第二光信号以形成组合的光信号，用于将导通到参考反射器的参考臂与通向样本的采样臂之间的组合光信号分开的干涉仪，以及用于检测 由来自参考臂和来自采样臂的组合光信号产生的干扰信号。 在实施例中，扫描光源是具有共享激光腔的可调激光器。
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公开(公告)号：US20140152997A1
公开(公告)日：2014-06-05
申请号：US14175158
申请日：2014-02-07
Applicant: Axsun Technologies, Inc.
Inventor： Brian Goldberg , Dale C. Flanders , Walid A. Atia , Bartley C. Johnson , Mark E. Kuznetsov
IPC: G01B9/02
CPC classification number: G01B9/02091 , A61B5/0066 , A61B5/0075 , G01N21/4795 , H01S5/02216 , H01S5/02248 , H01S5/02284 , H01S5/141 , H01S5/4012 , H01S5/4062 , H01S5/4068
Abstract: An optical coherence analysis system comprising: a first swept source that generates a first optical signal that is tuned over a first spectral scan band, a second swept source that generates a second optical signal that is tuned over a second spectral scan band, a combiner for combining the first optical signal and the second optical signal for form a combined optical signal, an interferometer for dividing the combined optical signal between a reference arm leading to a reference reflector and a sample arm leading to a sample, and a detector system for detecting an interference signal generated from the combined optical signal from the reference arm and from the sample arm. In embodiments, the swept sources are tunable lasers that have shared laser cavities.
Abstract translation: 一种光学相干分析系统，包括：第一扫描光源，其产生在第一光谱扫描带上调谐的第一光信号，产生在第二光谱扫描带上调谐的第二光信号的第二扫描光源， 组合第一光信号和第二光信号以形成组合的光信号，用于将导通到参考反射器的参考臂与通向样本的采样臂之间的组合光信号分开的干涉仪，以及用于检测 由来自参考臂和来自采样臂的组合光信号产生的干扰信号。 在实施例中，扫描光源是具有共享激光腔的可调激光器。
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3.发明申请公开(公告)号：US20140125986A1
公开(公告)日：2014-05-08
申请号：US13670935
申请日：2012-11-07
Applicant: Axsun Technologies, Inc.
Inventor： Bartley C. Johnson , Dale C. Flanders
IPC: G01B9/02
CPC classification number: G01B9/02091 , G01B9/02004 , G01B9/02069
Abstract: An OCT system and particularly its clock system generates a k-clock signal but also generates an optical frequency reference sweep signal that, for example, indicates the start of the sweep or an absolute frequency reference associated with the sweep at least for the purposes of sampling of the interference signal and/or processing of that interference signal into the OCT images. The clock system is also tunable to allow the control or flexibility over the relationship between the scanning of the swept optical signal and the sampling of the interference signal by the data acquisition system. Specifically, the absolute frequencies of the swept optical signal at which the k-clock signals are generated can be adjusted. Also, the absolute frequency of the swept optical signal at which sampling of the interference signal is initiated can also be changed or stabilized. Moreover, optical frequency sampling interval defined by the k-clock signal can be changed under user control or simply stabilized.
Abstract translation: OCT系统，特别是其时钟系统产生k时钟信号，但是还产生光频参考扫描信号，其例如指示扫描的开始或与扫描相关联的绝对频率参考至少为了采样的目的 的干扰信号和/或将该干扰信号处理到OCT图像中。 时钟系统也是可调谐的，以允许对扫描光信号的扫描与数据采集系统对干扰信号的采样之间的关系的控制或灵活性。 具体地说，可以调整产生k时钟信号的扫描光信号的绝对频率。 此外，也可以改变或稳定干扰信号的采样开始的扫描光信号的绝对频率。 此外，由k时钟信号定义的光频采样间隔可以在用户控制下简单地稳定化。
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4.发明申请Method and System for Avoiding Package Induced Failure in Swept Semiconductor Source 有权扫描半导体源避免封装引发故障的方法和系统公开(公告)号：US20140119397A1
公开(公告)日：2014-05-01
申请号：US14150122
申请日：2014-01-08
Applicant: Axsun Technologies, Inc.
Inventor： Peter S. Whitney , Dale C. Flanders
CPC classification number: H01S5/026 , G01B9/02091 , H01S5/022 , H01S5/02216 , H01S5/0222 , H01S5/02224 , H01S5/02248 , H01S5/02284 , H01S5/02415 , H01S5/02438 , H01S5/068 , H01S5/06825 , H01S5/141 , H01S5/183
Abstract: Dry oxygen, dry air, or other gases such as ozone are hermetically sealed within the package of the external cavity laser or ASE swept source to avoid packaging-induced failure or PLF. PIF due to hydrocarbon breakdown at optical interfaces with high power densities is believed to occur at the SLED and/or SOA facets as well as the tunable Fabry-Perot reflector/filter elements and/or output fiber. Because the laser is an external cavity tunable laser and the configuration of the ASE swept sources, the power output can be low while the internal power at surfaces can be high leading to PIF at output powers much lower than the 50 mW.
Abstract translation: 干氧，干燥空气或其他气体如臭氧气密封在外腔激光器或ASE扫频源的封装内，以避免包装引起的故障或PLF。 相信在SLED和/或SOA面以及可调谐法布里 - 珀罗反射器/滤波器元件和/或输出光纤处发生由于在具有高功率密度的光学接口处的烃破坏引起的PIF。 因为激光器是外部可调谐激光器和ASE扫频源的配置，所以功率输出可能很低，而表面的内部功率可能很高，导致PIF的输出功率远低于50 mW。
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公开(公告)号：US20140016135A1
公开(公告)日：2014-01-16
申请号：US14028873
申请日：2013-09-17
Applicant: Axsun Technologies, Inc.
Inventor： Dale C. Flanders , Walid A. Atia , Bartley C. Johnson , Mark E. Kuznetsov , Carlos R. Melendez
IPC: G01B9/02
CPC classification number: G01B9/02091 , G01B9/02004 , G01B9/02044 , G01B9/02059 , G01B9/02069 , G01B2290/25 , H01S3/08013 , H01S3/08054 , H01S3/1067 , H01S5/02248 , H01S5/02415 , H01S5/068 , H01S5/141 , H01S5/146
Abstract: A frequency swept laser source for TEFD-OCT imaging includes an integrated clock subsystem on the optical bench with the laser source. The clock subsystem generates frequency clock signals as the optical signal is tuned over the scan band. Preferably the laser source further includes a cavity extender in its optical cavity between a tunable filter and gain medium to increase an optical distance between the tunable filter and the gain medium in order to control the location of laser intensity pattern noise. The laser also includes a fiber stub that allows for control over the cavity length while also controlling birefringence in the cavity.
Abstract translation: 用于TEFD-OCT成像的频率扫描激光源包括具有激光源的光学台上的集成时钟子系统。 当光信号在扫描带上调谐时，时钟子系统产生频率时钟信号。 优选地，激光源还包括在可调谐滤波器和增益介质之间的光腔中的腔体延长器，以增加可调谐滤波器和增益介质之间的光学距离，以便控制激光强度图案噪声的位置。 该激光器还包括一个纤维短截线，其允许控制腔体长度，同时还控制空腔中的双折射。
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Patent Agency Ranking
公开(公告)号：US11092426B2
公开(公告)日：2021-08-17
申请号：US15714365
申请日：2017-09-25
Applicant: Axsun Technologies, Inc.
Inventor： Bartley C. Johnson , Dale C. Flanders
Abstract: Optical coherence tomography (OCT) probe and system designs are disclosed that minimize the effects of mechanical movement and strain to the probe to the OCT analysis. It also concerns optical designs that are robust against noise from the OCT laser source. Also integrated OCT system-probes are included that yield compact and robust electro-opto-mechanical systems along with polarization sensitive OCT systems.
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公开(公告)号：US10855053B2
公开(公告)日：2020-12-01
申请号：US16129856
申请日：2018-09-13
Applicant: Axsun Technologies, Inc.
Inventor： Dale C. Flanders , Mark E. Kuznetsov , Walid A. Atia , Bartley C. Johnson
Abstract: A microelectromechanical systems (MEMS)-tunable vertical-cavity surface-emitting laser (VCSEL) in which the MEMS mirror is bonded to the active region. This allows for a separate electrostatic cavity that is outside the laser's optical resonant cavity. Moreover, the use of this cavity configuration allows the MEMS mirror to be tuned by pulling the mirror away from the active region. This reduces the risk of snap down. Moreover, since the MEMS mirror is now bonded to the active region, much wider latitude is available in the technologies that are used to fabricate the MEMS mirror. This is preferably deployed as a swept source in an optical coherence tomography (OCT) system.
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公开(公告)号：US08922782B2
公开(公告)日：2014-12-30
申请号：US13837425
申请日：2013-03-15
Applicant: Axsun Technologies, Inc.
Inventor： Dale C. Flanders
IPC: G01B9/02
CPC classification number: G01B9/02 , G01B9/02004 , G01B9/02044 , G01B9/02091
Abstract: An optical coherence tomography system uses an optical source that comprises a series of gain waveguides that generate light at the frequencies at which the interference signal is to be sampled. In this way, the optical source generates a discretely tuned optical signal. This has the advantage that the tuning can be directly controlled by a controller that is also used to synchronize the sampling of the interference signal. This avoids the need for separate frequency clock synchronization. In embodiments, the gain waveguides are fabricated from one or more semiconductor edge emitting bars. In some implementations, the gain waveguides comprise periodic structures that define the frequency of operation of the waveguide. However in other implementations, the combiner comprises a dispersive element, such as a diffractive grating, that provides frequency specific feedback to each waveguide.
Abstract translation: 光学相干断层摄影系统使用包括一系列增益波导的光源，该增益波导在干扰信号被采样的频率处产生光。 以这种方式，光源产生离散调谐的光信号。 这具有的优点是调谐可以由也用于同步干扰信号的采样的控制器直接控制。 这避免了单独的频率时钟同步的需要。 在实施例中，增益波导由一个或多个半导体边缘发射棒制成。 在一些实施方案中，增益波导包括限定波导的操作频率的周期性结构。 然而，在其他实现中，组合器包括向每个波导提供频率特定反馈的色散元件，例如衍射光栅。
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公开(公告)号：US20140125987A1
公开(公告)日：2014-05-08
申请号：US13852769
申请日：2013-03-28
Applicant: Axsun Technologies, Inc.
Inventor： Dale C. Flanders
IPC: G01B9/02
CPC classification number: G01B9/02091 , G01B9/02004 , G01B9/02051 , G01B9/02059 , G01B9/02069 , G01B2290/45 , G01B2290/70
Abstract: An optical detector system comprises a hermetic optoelectronic package, an optical bench installed within the optoelectronic package, a balanced detector system installed on the optical bench. The balanced detector system includes at least two optical detectors that receive interference signals. An electronic amplifier system installed within the optoelectronic package amplifies an output of at least two optical detectors. Also disclosed is an integrated optical coherence tomography system. Embodiments are provided in which the amplifiers, typically transimpedance amplifiers, are closely integrated with the optical detectors that detect the interference signals from the interferometer. Further embodiments are provided in which the interferometer but also preferably its detectors are integrated together on a common optical bench. Systems that have little or no optical fiber can thus be implemented.
Abstract translation: 光学检测器系统包括密封光电子封装，安装在光电封装内的光学平台，安装在光学平台上的平衡检测器系统。 平衡检测器系统包括至少两个接收干扰信号的光学检测器。 安装在光电封装内的电子放大器系统放大至少两个光学检测器的输出。 还公开了一种集成的光学相干断层摄影系统。 提供了实施例，其中放大器，通常是跨阻放大器，与检测来自干涉仪的干扰信号的光学检测器紧密集成。 提供了其它实施例，其中干涉仪还优选地其检测器在公共光学台上集成在一起。 因此可以实现具有很少或不具有光纤的系统。
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公开(公告)号：US10161738B2
公开(公告)日：2018-12-25
申请号：US14144636
申请日：2013-12-31
Applicant: Axsun Technologies, Inc.
Inventor： Bartley C. Johnson , Dale C. Flanders
Abstract: An optical coherence tomography system utilizes an optical swept laser that has cavity length compensator that changes an optical length of the laser cavity for different optical frequencies to increase the length of the laser cavity for lower optical frequencies. Specifically, a spectral separation between longitudinal cavity modes of the laser cavity is shortened or alternatively lengthened as a passband of a cavity tuning element sweeps through a scanband of the swept optical signal. In some examples, the compensator is implemented as two gratings. In others, it is implemented as a chirped grating device.
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