公开(公告)号：US07166843B2

公开(公告)日：2007-01-23

申请号：US10766327

申请日：2004-01-29

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: G01N21/35

CPC classification number: G01N21/39 ,  G01N21/3504

Abstract: A system and method can detect ethylene oxide in a sample of gas, such as air. The system includes a light source operating at a wavelength where molecules typically found within air absorb light at a substantially lower level than ethylene oxide molecules. Exemplary wavelengths are in the range of approximately 1.6–2.2 μm, and in particular at 1.6 μm, 1.645 μm, 1.692 μm, 2.195 μm, 2.2 μm, 2.216 μm, passes through the sample of gas to be detected by a detector. In one variation, the light source is a tunable diode laser or a VCSEL and the ethylene oxide level is determined using harmonic spectroscopy.

Abstract translation: 系统和方法可以检测气体样品中的环氧乙烷，例如空气。 该系统包括以通常在空气中发现的分子以比环氧乙烷分子基本上更低的水平吸收光的波长操作的光源。 示例性的波长在1.6-2.2μm的范围内，特别是1.6μm，1.645μm，1.692μm，2.195μm，2.2μm，2.216μm，通过检测器检测的气体样品。 在一个变型中，光源是可调二极管激光器或VCSEL，并且使用谐波光谱确定环氧乙烷水平。

公开(公告)号：US06587484B1

公开(公告)日：2003-07-01

申请号：US09685212

申请日：2000-10-10

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: H01S310

CPC classification number: H01S5/0687 ,  H01S3/1303 ,  H01S5/0617 ,  H01S5/4087

Abstract: The method and apparatus operates to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM). In one example, the transmission laser is a widely tunable laser (WTL) to be tuned to one of a set of International Telecommunications Union (ITU) transmission grid lines for transmission through an optic fiber. The WTL is tuned to the ITU grid using an etalon and a gas cell having acetylene, hydrogen cyanide or carbon dioxide. Initially, the absolute transmission wavelengths of the WTL are calibrated by routing an output beam from the WTL through the etalon and through the gas cell while varying tuning parameters of the WTL to thereby generate an etalon spectrum and a gas absorption spectrum both as functions of the tuning parameters. The etalon and gas absorption spectra are compared, along with input reference information specifying gas absorption as a function of absolute wavelength, to determine the absolute transmission wavelength for the WTL as a function of the tuning parameters. The WTL is then tuned to align the transmission wavelength of the WTL to an ITU transmission grid line.

Abstract translation: 该方法和装置用于校准密集波分复用器（DWDM）的传输激光器。 在一个示例中，传输激光器是要调谐到一组国际电信联盟（ITU）传输网格线之一的可广泛调谐的激光器（WTL），用于通过光纤传输。 使用标准具和具有乙炔，氰化氢或二氧化碳的气室将WTL调整到国际电联网格。 最初，WTL的绝对透射波长通过在WTL的输出光束通过标准具和通过气体单元的同时改变WTL的调谐参数进行校准，由此产生标准具光谱和气体吸收光谱，作为 调整参数。 将标准具和气体吸收光谱与指定作为绝对波长的函数的气体吸收的输入参考信息进行比较，以确定作为调谐参数的函数的WTL的绝对透射波长。 然后调整WTL以使WTL的传输波长与ITU传输网格线对齐。

公开(公告)号：US08182143B2

公开(公告)日：2012-05-22

申请号：US11836588

申请日：2007-08-09

Applicant: Rex J. Fleming ,  Randy Dean May ,  W. Stephen Woodward

Inventor： Rex J. Fleming ,  Randy Dean May ,  W. Stephen Woodward

IPC: G01K1/02 ,  G01K17/06 ,  G01K17/10 ,  G01K13/02

CPC classification number: G01K13/02 ,  G01K13/028

Abstract: Ambient temperature for a temperature sensor can be calculated using a mobile temperature sensor system that samples air from the boundary layer around a mobile platform and passes the air through a measurement cell containing two flush-mounted or embedded sensor elements. A common reference voltage can be applied by control circuitry to minimize drift in the sensor element readings and to calculate the ambient temperature.

Abstract translation: 可以使用移动式温度传感器系统来计算温度传感器的环境温度，该系统从移动平台周围的边界层采集空气，并将空气通过含有两个嵌入式或嵌入式传感器元件的测量单元。 控制电路可以应用公共参考电压，以最小化传感器元件读数中的漂移并计算环境温度。

公开(公告)号：US06690687B2

公开(公告)日：2004-02-10

申请号：US09753285

申请日：2001-01-02

Applicant: Alexander Ksendzov ,  Randy Dean May

Inventor： Alexander Ksendzov ,  Randy Dean May

IPC: H01S310

CPC classification number: H01S5/141 ,  H01S5/0687 ,  H01S5/1028 ,  H01S5/1032

Abstract: A semiconductor laser is provided having a cavity including a gain chip, a Mach-Zehnder wide tuning port, and a ring resonator mirror. Optical signals generated by the gain chip propagate through the Mach-Zehnder wide tuning port and into the ring resonator mirror where the optical signals are reflected back through the Mach-Zehnder wide tuning port to the gain chip. The ring resonator is configured to reflect only those optical signals back into the laser cavity having wavelengths within a set of sharp peaks and the laser cavity therefore can resonate only within one of the sharp peaks. The ring resonator mirror is heated to adjust its dimensions so as to maintain one of the sharp peaks at a selected emission wavelength. As optical signals reflected from the ring resonator pass through the Mach-Zehnder wide tuning port, the signals are split between two channels of differing lengths resulting in optical interference. The optical interference limits the ability of the laser cavity to resonate at wavelengths other than near the center of a single broad peak determined by the relative lengths of the two channels. The Mach-Zehnder wide tuning port is heated to vary the relative lengths of the two channels so as to maintain the single broad peak at the selected transmission wavelength. In this manner, the laser cavity is controlled to resonate substantially only at the selected wavelength. Resonance at the other sharp resonance peaks permitted by the ring resonator is significantly reduced, thereby significantly reducing transmission sidebands generated by the laser.

Abstract translation: 提供一种半导体激光器，其具有包括增益芯片，Mach-Zehnder宽调谐端口和环形谐振器反射镜的腔体。 由增益芯片产生的光信号通过马赫 - 曾德尔宽调谐端口传播到环形谐振器反射镜中，其中光信号通过马赫 - 曾德尔宽调谐端口反射回增益芯片。 环形谐振器被配置为只将那些光信号反射回具有在一组尖锐峰内的波长的激光腔，并且激光腔因此只能在尖峰之一内谐振。 环形谐振镜被加热以调节其尺寸，以便将尖锐的峰之一保持在选定的发射波长。 由于从环形谐振器反射的光信号通过马赫 - 曾德尔宽调谐端口，信号在不同长度的两个通道之间分裂，导致光学干扰。 光学干涉限制了激光腔在不同于由两个通道的相对长度确定的单个宽峰的中心附近的波长处的谐振能力。 Mach-Zehnder宽调谐端口被加热以改变两个通道的相对长度，以便在所选择的透射波长处保持单个宽峰值。 以这种方式，激光腔被控制以基本上仅在所选择的波长下谐振。 在环形谐振器允许的其他尖锐谐振峰值处的谐振显着降低，从而显着减少由激光器产生的传输边带。

公开(公告)号：US07504631B2

公开(公告)日：2009-03-17

申请号：US11586897

申请日：2006-10-25

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: G01J5/02

CPC classification number: G01J3/4338 ,  G01N21/05 ,  G01N21/3504 ,  G01N21/3554 ,  G01N21/39 ,  G01N2021/354 ,  G01N2021/399

Abstract: A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877-1.901 μm, 2.711-2.786 μm, or 920-960 nm, passes through the natural gas to be detected by a detector. In one embodiment, the light source is a tunable diode laser and the moisture level is determined by harmonic spectroscopy. In other embodiments, a VCSEL laser is utilized.

Abstract translation: 公开了一种在天然气背景下检测水蒸气的系统和方法。 该系统包括在诸如1.877-1.901mum，2.711-2.786mum或920-960nm的波长范围内工作的光源，通过检测器检测的天然气。 在一个实施例中，光源是可调二极管激光器，并且通过谐波光谱确定湿度水平。 在其他实施例中，使用VCSEL激光器。

公开(公告)号：US07132661B2

公开(公告)日：2006-11-07

申请号：US10688723

申请日：2003-10-16

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: G01J5/02 ,  G01N21/39 ,  G01N21/35

CPC classification number: G01J3/4338 ,  G01N21/05 ,  G01N21/3504 ,  G01N21/3554 ,  G01N21/39 ,  G01N2021/354 ,  G01N2021/399

Abstract: A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877–1.901 μm, 2.711–2.786 μm, or 920–960 nm, passes through the natural gas to be detected by a detector. In one embodiment, the light source is a tunable diode laser and the moisture level is determined by harmonic spectroscopy. In other embodiments, a VCSEL laser is utilized.

公开(公告)号：US06671296B2

公开(公告)日：2003-12-30

申请号：US10090936

申请日：2002-03-05

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: H01S313

CPC classification number: G01J3/02 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/28 ,  G01J9/00 ,  H01S3/1303 ,  H01S5/0014 ,  H01S5/0617 ,  H01S5/0687 ,  H01S5/4087

Abstract: The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a transmission line for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector to determine the power of the beam. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift attributable to the etalon.

Abstract translation: 该方法和系统用于维持在选定的透射波长下的广泛可调激光（WTL）。 为了将WTL锁定到国际电联电网线路，来自WTL的输出波束的一部分被路由通过标准具将光束分成传输线，以便由标准具条纹检测器进行检测。 光束的另一部分被直接路由到激光波长检测器以确定光束的功率。 波长锁定控制器比较来自两个检测器的信号，并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准，然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后，波长锁定控制器监测标准具的温度并保持温度恒定，以防止归因于标准具的任何波长漂移。

公开(公告)号：US20080159354A1

公开(公告)日：2008-07-03

申请号：US11836588

申请日：2007-08-09

Applicant: Rex J. Fleming ,  Randy Dean May ,  W. Stephen Woodward

Inventor： Rex J. Fleming ,  Randy Dean May ,  W. Stephen Woodward

IPC: G01K13/02

CPC classification number: G01K13/02 ,  G01K13/028

Abstract: Ambient temperature for a temperature sensor can be calculated using a mobile temperature sensor system that samples air from the boundary layer around a mobile platform and passes the air through a measurement cell containing two flush-mounted or embedded sensor elements. A common reference voltage can be applied by control circuitry to minimize drift in the sensor element readings and to calculate the ambient temperature.

Abstract translation: 可以使用移动式温度传感器系统来计算温度传感器的环境温度，该系统从移动平台周围的边界层采集空气，并将空气通过含有两个嵌入式或嵌入式传感器元件的测量单元。 控制电路可以应用公共参考电压，以最小化传感器元件读数中的漂移并计算环境温度。

公开(公告)号：US07027470B2

公开(公告)日：2006-04-11

申请号：US10639241

申请日：2003-08-11

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: H01S3/10 ,  H01S3/13

CPC classification number: G01J3/02 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/28 ,  G01J9/00 ,  H01S3/1303 ,  H01S5/0014 ,  H01S5/0617 ,  H01S5/0687 ,  H01S5/4087

Abstract: The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a transmission line for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector to determine the power of the beam. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift attributable to the etalon.

Abstract translation: 该方法和系统用于维持在选定的透射波长下的广泛可调激光（WTL）。 为了将WTL锁定到国际电联电网线路，来自WTL的输出波束的一部分被路由通过标准具将光束分成传输线，以便由标准具条纹检测器进行检测。 光束的另一部分被直接路由到激光波长检测器以确定光束的功率。 波长锁定控制器比较来自两个检测器的信号，并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准，然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后，波长锁定控制器监测标准具的温度并保持温度恒定，以防止归因于标准具的任何波长漂移。

公开(公告)号：US06693928B2

公开(公告)日：2004-02-17

申请号：US09966152

申请日：2001-09-28

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: H01S3098

CPC classification number: H01S5/0687 ,  H01S3/1303 ,  H01S5/0617 ,  H01S5/4087

Abstract: The method and system operate to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM) and to lock the laser to a selected transmission wavelength. In one example, the transmission laser is a widely tunable laser (WTL) to be tuned to one of a set of International Telecommunications Union (ITU) transmission grid lines for transmission through an optic fiber. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a set of transmission lines for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift in the etalon. In one example, the optical components are aligned so that laser wavelength detector receives a portion of the laser beam directly from the laser so that phase characteristics of the laser beam are not affected by an intervening beamsplitter thereby permitting improved wavelength locking. In another embodiment, an etalon chirp filter is provided for reducing or eliminating optical frequency chirp, regardless of the particular ITU channel being used for transmission.

Abstract translation: 该方法和系统用于校准密集波分复用器（DWDM）的传输激光器并将激光器锁定到所选择的传输波长。 在一个示例中，传输激光器是要调谐到一组国际电信联盟（ITU）传输网格线之一的可广泛调谐的激光器（WTL），用于通过光纤传输。 为了将WTL锁定到国际电联电网线路，来自WTL的输出波束的一部分被路由通过标准具将光束分成一组传输线，以便由标准具条纹检测器进行检测。 光束的另一部分直接路由到激光波长检测器。 波长锁定控制器比较来自两个检测器的信号，并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准，然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后，波长锁定控制器监测标准具的温度并保持温度恒定，以防止标准具中的任何波长漂移。 在一个示例中，对准光学部件，使得激光波长检测器直接从激光器接收激光束的一部分，使得激光束的相位特性不受中间分束器的影响，从而允许改进的波长锁定。 在另一个实施例中，提供标准具啁啾滤波器用于减少或消除光频率啁啾，而不管用于传输的特定ITU信道。