Pasadena, CA, United States
Pasadena, CA, United States

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Patent
OEwaves, Inc. | Date: 2017-01-25

An optical atomic clock utilizing two different laser light sources is described. A source laser is locked to a first optical resonator, which supports a whispering gallery mode for the source laser and generates optical hyperparametric sidebands from the source laser output by multi-wave mixing. A reference laser is locked to an atomic reference via a second optical resonator, and the first optical resonator is locked to the reference laser. Optical parametric sidebands, which are locked to an atomic reference but are generated from a wavelength unrelated to the clock transition of the atomic reference, are coupled out of the first optical resonator to generate an RF signal useful in atomic timekeeping.


Patent
OEwaves, Inc. | Date: 2015-03-18

An optical atomic clock utilizing two different laser light sources is described. A source laser is locked to a first optical resonator, which supports a whispering gallery mode for the source laser and generates optical hyperparametric sidebands from the source laser output by multi-wave mixing. A reference laser is locked to an atomic reference via a second optical resonator, and the first optical resonator is locked to the reference laser. Optical parametric sidebands, which are locked to an atomic reference but are generated from a wavelength unrelated to the clock transition of the atomic reference, are coupled out of the first optical resonator to generate an RF signal useful in atomic timekeeping.


Patent
OEwaves, Inc. | Date: 2014-04-25

An external cavity laser comprises a gain medium and an external cavity resonator without the use of a semi-reflective surface placed between the gain medium and the resonator. Radiation from the gain medium is reflected back to the gain medium by one or more resonant backscattering regions of the resonator, such that the entire optical path between the gain medium and the external cavity resonator could be free from a reflective surface.


Patent
OEwaves, Inc. | Date: 2016-04-06

An FM LIDAR system is described that includes a frequency modulated LIDAR system that incorporates a laser source that is optically coupled to a whispering gallery mode optical resonator. Light from the laser that is coupled into the whispering gallery mode optical resonator is coupled back out as a returning counterpropagating wave having a frequency characteristic of a whispering gallery mode of the optical resonator. This returning wave is used to reduce the linewidth of the source laser by optical injection. Modulation of the optical properties of the whispering gallery mode optical resonator results in modulation of the frequency of the frequencies supported by whispering gallery modes of the resonator, and provides a method for producing highly linear and reproducible optical chirps that are highly suited for use in a LIDAR system. Methods of using such an FM LIDAR system and vehicle assisting systems that incorporate such FM LIDAR systems are also described.


Patent
OEwaves, Inc. | Date: 2014-03-12

A monolithic resonator that has a plurality of mode families is modified so that portions of the resonator have a different index of refraction than other portions of the resonator. This degrades the C) factor of one or more of the mode families, allowing pre-selection of one or more mode families over others.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2014

ABSTRACT: The Global Positioning System (GPS) has become an essential part of military, and numerous civilian, systems. It is widely used in diverse applications, including timekeeping and position location. Despite its success and usefulness, the present GPS system is not capable of fully satisfying the emerging needs of future military and civilian applications, owing to emergence of advanced technologies and architectures. For these advanced applications, improved timekeeping and position location capabilities must be developed. In particular, the key to improved capabilities is high performance, compact precision atomic clocks (CPAC) with long-term stability of 1 x 10-16. Recent advances in atomic clock technology, based on the use of optical transition in atomic species has indeed led to demonstration of remarkable performance at 10-18 stability level. This level of stability more than meets the future needs of GPS, but unfortunately has been realized only in advanced metrological laboratories. The size, volume, and power requirements of these advanced clocks are far beyond the constraints imposed by capacity of GPS vehicles. Furthermore, the underlying technologies require advanced equipment such as high performance lasers at wavelengths that are beyond the reach of commercial availability. It is clear that a suitable clock capable of reliable operation in space vehicles must be based on a radically new approach. BENEFIT: OEwaves has a successful history in transitioning results of R & D and bringing products to the marketplace. The need for miniature optical clocks, based on the ultra-stable microresonator developed during current effort, with small power consumption and inexpensive packages extends beyond fundamental science. The clocks are desirable practically for any navigation platform. They also would improve secure communication capabilities. This broader academic and commercial market will increase the volume of the manufacturing base, supplying Government with commercial off-the-shelf products that meet their needs at lower unit cost. Potential customers include: Federal government (DoD, NASA, NOAA, NIST) Defense contractors Communications system vendors Academic laboratories Test equipment vendors


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2014

ABSTRACT: We propose to create a compact laser system suitable for a Sr lattice clock application. The system includes a diode laser stabilized to an ultrahigh-Q 698-nm microcavityto achieve 1x10-14 frequency instability at 1 second integration as well as generation of a Kerr frequency comb having the same frequency instability level. This advancement is based on state-of-the-art measurements and preliminary results by our team, enabled by the highest quality factor optical resonators measured to-date. Our program consists of two integrated tasks: (1) self-injection phase and frequency locking of a cavity-laser and noise cancellation beyond the thermal noise limit with ultrahigh-Q microcavities (cold microcavity Q>1010) and(2) second-stage stabilization through thermal division by the microcavity frequency comb for frequency instability better than 10-14 at 1 second. The comb will be centered at the 698-nm optical frequency suitable for the divalent Sr 1So-3Po clock transition interrogation. BENEFIT: The optical resonator developed in this Project will have far superior performance to any other advanced fieldable resonators with comparable size, power consumption, and cost. The examined 698-nm resonator is directly compatible with the long-term stable Sr1So-3Po clock transition, allowing the world"s best timing and frequency standard in a compact realization. We expect that this Project will result in a visible-frequency resonator clock and comb prototype that will be ready for transition to both military and civilian applications. The resonator will dramatically enhance the performance of a wide range of DOD systems, and civilian products. While the resonator has multiple applications, we will focus our efforts on its usage for compact all-optical atomic clocks, being of interest to DoD.


Grant
Agency: Department of Defense | Branch: Defense Advanced Research Projects Agency | Program: SBIR | Phase: Phase II | Award Amount: 1.50M | Year: 2015

In this Phase II DARPA SBIR effort, OEwaves Inc., along with UC Davis, will investigate, design, build, test, characterize and deliver for independent Government testing a miniature oscillator based on an optical Kerr frequency comb [1-8] produced with an ultra-high Q crystalline microresonator [9], for targeted use in electronic warfare receivers and transmitters. The projected performance of the oscillator is outlined in Table 1. This oscillator will specifically satisfy the needs of emerging architectures based on combining signals of multiple, small, and spatially dispersed platforms to receive and transmit electronic warfare signals in a segmented interferometer configuration. This game changing approach will fundamentally alter future electronic warfare, and is directly dependent on the performance of the oscillator in receivers and transmitters.


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 150.00K | Year: 2015

ABSTRACT:High-power, compact, low noise, high stability, narrow-linewidth lasers are needed for coherent LADAR systems including synthetic aperture imaging, remote vibrometry, holographic imaging as well as radar, navigation, and timing. Since LADARs are usually used on moving platforms, the insensitivity of the laser to vibration and acceleration is extremely important. In addition, there is a need in sub-kHz linewidth, small footprint, highly coherent diode lasers with long term frequency stability which would be beneficial in many areas of optics including radio frequency (RF) photonic link applications, communications, metrology, and spectroscopy. The objective of Phase I of this SBIR project is to define and develop a design, and demonstrate a protoype model of a low noise, narrow-linewidth laser/master oscillator for coherent LADAR system applications on air platforms.BENEFIT:The anticipated market segments for the 2 Micron ultra-low frequency noise semiconductor laser source include carbon dioxide and other gas destection, coherent LIDAR, frequency conversion, optical metrology and spectroscopy, as well as free-space optical communication applications. The lasers can be of great interest for insertion into airborne and space applications. Since the proposed technology can be easily extended to different wavelengths, the narrow linewidth lasers also could be useful for oil and gas exploration, structural health monitoring, security and sensing, atomic and molecular spectroscopy, and various other fiber optic sensing markets. All these market segments need laser sources with improved phase/frequency noise performance in smaller, less expensive packages.


Patent
OEwaves, Inc. | Date: 2014-03-13

A light spectrum generator uses an input continuous light source well within the normal GVD of a resonator to produce a multi-wavelength spectrum having irregularly spaced harmonics that could span wavelengths of more than six octaves from one another. Combined with a tuner that adjusts the power and wavelength of the light source, a turner that adjusts a temperature or a pressure applied to the resonator, and a filter, the generator could be used to produce any wavelength of light between 0.1 and 10 m.

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