| Patent Number |
Title Of Patent |
Date Issued |
| 7436867 |
Hermetically sealed external cavity laser system and method |
October 14, 2008 |
| A laser apparatus in a hermetically sealed container and methods for hermetically sealing the laser. The laser apparatus comprising an external cavity laser and a modulator in a single hermetically sealed enclosure. |
| 7403679 |
Thermally tunable optical dispersion compensation devices |
July 22, 2008 |
| Thermally tunable optical dispersion compensation (ODC) devices are disclosed. In one aspect, an ODC device may include multiple Gires-Tournois (G-T) etalons. The etalons may be optically coupled together. The etalons may compensate for optical dispersion by collectively delaying lig |
| 7333526 |
Coarse spectrometer with a grating |
February 19, 2008 |
| A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lockers to compensate |
| 7259904 |
Coarse spectrometer with a grating |
August 21, 2007 |
| A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lockers to compensate |
| 7218650 |
Wavelength reference filter |
May 15, 2007 |
| A wavelength reference filter for receiving an input signal and producing a filtered output signal is provided. The operation of the filter is independent of the angle of incidence of the input signal. As a result, the output signal from the filter will maintain its wavelength, even |
| 7120176 |
Wavelength reference apparatus and method |
October 10, 2006 |
| Apparatus and methods usable for wavelength references and measurement of wavelength of a light beam. The apparatus comprise at least two wavelength reference or filter elements positioned in a light beam, each wavelength reference element having a different free spectral range and o |
| 7106487 |
Thermal tuning of a laser using doped silicon etalon |
September 12, 2006 |
| In embodiments of the invention, a wavelength-selective device is doped with n-type or p-type material to make the single-crystal silicon in the active region of the device electrically conductive. An electrically conductive and thermally conductive active region allows an external h |
| 7042917 |
Laser apparatus with active thermal tuning of external cavity |
May 9, 2006 |
| A laser apparatus and method that uses active thermalization of a reflective element to minimize losses and provide wavelength stability. The laser comprises first and second reflectors defining an external cavity, and a compensating member coupled to at least one of the reflectors a |
| 6993057 |
Coarse spectrometer with a grating |
January 31, 2006 |
| A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lockers to compensate |
| 6972907 |
Tunable laser modules incorporating micromachined pellicle splitters |
December 6, 2005 |
| A micromachined pellicle beam splitter and method of manufacture thereof are disclosed. In one embodiment, the beam splitter includes a silicon frame with a silicon nitride membrane attached to the frame and covering an opening through the frame. Other materials may be utilized, however, |
| 6859330 |
Micromachined pellicle splitters and tunable laser modules incorporating same |
February 22, 2005 |
| A micromachined pellicle beam splitter and method of manufacture thereof are disclosed. In one embodiment, the beam splitter includes a silicon frame with a silicon nitride membrane attached to the frame and covering an opening through the frame. Other materials may be utilized, however, |
| 6845121 |
Optical isolator apparatus and methods |
January 18, 2005 |
| Methods and apparatus for optimizing feedback suppression of optical isolators when used with variable wavelength light sources. The methods comprise positioning an optical isolator in a light beam, and adjusting feedback suppression by the optical isolator according to wavelength of |
| 6822996 |
Mount having high mechanical stiffness and tunable external cavity laser assembly including same |
November 23, 2004 |
| A laser apparatus wherein all optical components are mounted on a unitary, rigid base. Natural frequency modes of the apparatus are above about 2 kHz. Tuning elements in the apparatus may have natural frequencies greater than about 10 kHz. |
| 6804278 |
Evaluation and adjustment of laser losses according to voltage across gain medium |
October 12, 2004 |
| Systems and methods for probing or evaluating optical loss characteristics associated with lasers by monitoring voltage across a laser gain medium, and a laser and method of laser operation wherein intra-cavity losses are determined by monitoring voltage across a gain medium and wherein |
| 6763047 |
External cavity laser apparatus and methods |
July 13, 2004 |
| Laser apparatus and methods that use active thermal adjustment of an external laser cavity to minimize losses and provide wavelength stability and provide wavelength tuning. The apparatus comprise a thermally conductive platform, a gain medium thermally coupled to the platform, the g |
| 6717965 |
Graded thin film wedge interference filter and method of use for laser tuning |
April 6, 2004 |
| A laser employing a tapered, thin film interference filter as a tuning element. Tapered, thin film interference filters employing dielectric layers are disclosed for use in tuning lasers. Methods of tuning a laser by adjustably positioning a tapered thin film interference filter are |
| 6665321 |
Tunable laser operation with locally commensurate condition |
December 16, 2003 |
| A method for selecting free spectral ranges (FSR) of intra-cavity optics to optimize reliability of the channel switching mechanism and corresponding apparatus. In particular, the optimal relationship between the FSR of the internal etalon and the FSR of the laser cavity is derived. For |
| 6661814 |
Method and apparatus for suppressing stimulated brillouin scattering in fiber links |
December 9, 2003 |
| Method and apparatus for producing a laser output having stimulated Brillouin scattering (SBS) suppression characteristics. An excitation signal is provided to an optical path length adjustment element in an external cavity laser to modulate the optical path length of the cavity. Thi |
| 6658031 |
Laser apparatus with active thermal tuning of external cavity |
December 2, 2003 |
| A laser apparatus and method that uses active thermalization of a reflective element to minimize losses and provide wavelength stability. The laser comprises first and second reflectors defining an external cavity, and a compensating member coupled to at least one of the reflectors a |
| 6115192 |
Apparatus for adjustable spherical aberration correction |
September 5, 2000 |
| A pair of compensation lenses which provide an adjustable amount of spherical aberration. Each compensation lens has an external surface and an internal surface. The internal surfaces face each other and define an air gap spacing between them. The external surfaces are preferably planar. |
| 6023365 |
DMD illumination coupler |
February 8, 2000 |
| A DMD illumination coupler, and a method of improving the wavefront quality of a transmitted illumination beam over the prior art using the invented DMD illumination coupler are disclosed. The invented DMD illumination coupler comprises an angularly selective reflective thin film. The |
| 5995292 |
Apparatus for adjustable spherical aberration correction |
November 30, 1999 |
| A pair of compensation lenses which provide an adjustable amount of spherical aberration. Each compensation lens has an external surface and an internal surface. The internal surfaces face each other and define an air gap spacing between them. The external surfaces are preferably planar. |
| 5044709 |
LED array polarized image source/0 degree hologram virtual image head up display |
September 3, 1991 |
| A holographic display system having a dynamic image source including selectively activated light emitting diodes for providing spectrally narrowband and narrow beam imaging illumination through an apertured mask, and further having a mirror reflection hologram for reflecting the image |
