Patents by Inventor Martin Achtenhagen
Martin Achtenhagen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8995481Abstract: An optical system includes an electrically pumped laser light source and an optically pumped laser light source. An optical switch is located in a light path of the electrically pumped laser light source such that when the optical switch is in a first position light from the electrically pumped laser light source is directed toward the optically pumped laser light source and when the optical switch is in a second position light from the electrically pumped laser light source is directed away from the optically pumped laser light source.Type: GrantFiled: February 12, 2014Date of Patent: March 31, 2015Assignee: Photodigm, Inc.Inventors: Martin Achtenhagen, John Edward Spencer
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Publication number: 20140160555Abstract: An optical system includes an electrically pumped laser light source and an optically pumped laser light source. An optical switch is located in a light path of the electrically pumped laser light source such that when the optical switch is in a first position light from the electrically pumped laser light source is directed toward the optically pumped laser light source and when the optical switch is in a second position light from the electrically pumped laser light source is directed away from the optically pumped laser light source.Type: ApplicationFiled: February 12, 2014Publication date: June 12, 2014Applicant: PHOTODIGM, INC.Inventors: Martin Achtenhagen, John Edward Spencer
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Patent number: 8693513Abstract: An optical system includes an electrically pumped laser light source and an optically pumped laser light source. An optical switch is located in a light path of the electrically pumped laser light source such that when the optical switch is in a first position light from the electrically pumped laser light source is directed toward the optically pumped laser light source and when the optical switch is in a second position light from the electrically pumped laser light source is directed away from the optically pumped laser light source.Type: GrantFiled: October 13, 2011Date of Patent: April 8, 2014Assignee: Photodigm, Inc.Inventors: Martin Achtenhagen, John Edward Spencer
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Publication number: 20120195021Abstract: A display system includes an optical light source and a display panel with an array of optically excitable pixels. Optics are positioned between the optical light source and the display panel so as to direct light from the optical light source toward the display panel to cause the optically excitable pixels to emit a visible image.Type: ApplicationFiled: October 28, 2011Publication date: August 2, 2012Applicant: Photodigm, Inc.Inventors: Martin Achtenhagen, Cheryl Achtenhagen, Preston P. Young, John Edward Spencer
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Publication number: 20120033290Abstract: An optical system includes an electrically pumped laser light source and an optically pumped laser light source. An optical switch is located in a light path of the electrically pumped laser light source such that when the optical switch is in a first position light from the electrically pumped laser light source is directed toward the optically pumped laser light source and when the optical switch is in a second position light from the electrically pumped laser light source is directed away from the optically pumped laser light source.Type: ApplicationFiled: October 13, 2011Publication date: February 9, 2012Applicant: Photodigm, Inc.Inventors: Martin Achtenhagen, John Edward Spencer
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Publication number: 20100284435Abstract: A semiconductor laser is provided, and a method of producing 600-1100 laser light, and a method of making a semiconductor laser is provided. The semiconductor laser includes a quantum well layer with a spectral profile of peak wavelength ?g, a laser gain region, a window region and an optical feedback region. The laser gain region is configured to accept a current injected into the quantum well layer. The window region includes a light emitting facet, wherein the window region is not configured to receive current-injection into the quantum well layer. The optical feedback region has a spectral profile of peak wavelength ?of, and ?of>?g.Type: ApplicationFiled: July 25, 2008Publication date: November 11, 2010Inventors: Martin Achtenhagen, Linglin Jiang
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Publication number: 20090168814Abstract: A method of manufacturing a second harmonic laser system is provided. A seed laser is optically coupled to a first port of a polarizing beam splitter using a polarization maintaining fiber. A first end of a non-polarization maintaining doped optical fiber is optically coupled to a second port of the polarizing beam splitter. A second end of a non-polarization maintaining doped optical fiber is optically connected to a rotator/reflector. A third port of the polarizing beam splitter is optically coupled to a nonlinear crystal.Type: ApplicationFiled: January 2, 2008Publication date: July 2, 2009Inventor: Martin Achtenhagen
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Publication number: 20090168820Abstract: A semiconductor laser system comprising a gain region, a gain contact coupled to the gain region, and a distributed Bragg reflector (DBR) having a near side and a far side with respect to the gain region are provided. The DBR reflects a resonant frequency of light back into the gain region. The semiconductor laser system further comprises a heat conducting structure, wherein the heat-conducting structure is positioned to transfer heat in a direction from the near side to the far side of the DBR grating, and an outcoupler, positioned to outcouple the resonant frequency of light from the semiconductor laser system.Type: ApplicationFiled: December 28, 2007Publication date: July 2, 2009Inventors: Martin Achtenhagen, Nuditha Vibhavie Amarasinghe
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Publication number: 20090103576Abstract: A system and method of providing second harmonic generation (SHG) light in a single pass. A frequency stabilized semiconductor seed laser provides a first frequency light to a fiber amplifier. A focusing optic configuration receives the amplified first frequency light and focuses the amplified first frequency light into a non-linear material. A harmonic separator separates the first frequency light from the second frequency light and an optical output structure outputs the second frequency light.Type: ApplicationFiled: October 17, 2007Publication date: April 23, 2009Inventor: Martin Achtenhagen
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Publication number: 20090083679Abstract: A method, a data processing method, and a computer program product for the design of efficient second harmonic generation semiconductor lasers is disclosed. A method for determining an optimum laser configuration includes the determination of a conversion efficiency curve for each SHG configuration using a target conversion efficiency. Each curve, on a log10-log10 scale, comprises a first linear portion, a knee region, and a second linear portion. Upon selecting a target SHG-power value, an SHG laser system configuration, in which the target SHG-power value is within the knee region of the conversion efficiency curve, is determined. The SHG laser system configuration is then output.Type: ApplicationFiled: September 24, 2007Publication date: March 26, 2009Inventors: Martin Achtenhagen, John Edward Spencer
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Publication number: 20080310465Abstract: A system and method for emitting a plurality of second harmonic light frequencies that is generally unaffected by small variations in external cavity length and temperature. An illustrative embodiment provides a laser system that comprises a semiconductor gain region operating within the coherence collapse regime, an intra-cavity nonlinear optical medium, and a feedback reflector. The semiconductor gain region operates in the coherence collapse regime and produces broad frequency fundamental light, the nonlinear resonator doubles a first portion of the broad frequency fundamental light and emits a plurality of second harmonic light frequencies external to the laser system. A second portion of the broad frequency fundamental light is reflected into the semiconductor gain region with a feedback power ratio sufficient to cause the semiconductor gain region to operate in the coherence collapse regime.Type: ApplicationFiled: June 14, 2007Publication date: December 18, 2008Inventor: Martin Achtenhagen
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Publication number: 20080225918Abstract: A system and a method of manufacture for a semiconductor laser with a continuous waveguide ridge extending the length of the laser. The continuous waveguide ridge is positioned through the center of the optical components of the semiconductor laser. The optical components including the waveguide ridge may be distributed Bragg reflectors (DBRs), outcoupling gratings, and phase controllers. The illustrated embodiments include lateral-grating grating-stabilized edge-emitting lasers and lateral-grating grating-stabilized surface-emitting (GSE) lasers. Both loss-coupled and non-loss-coupled lateral-grating components are illustrated.Type: ApplicationFiled: March 14, 2007Publication date: September 18, 2008Inventors: Martin Achtenhagen, Gary Alan Evans, Nuditha Vibhavie Amarasinghe, Taha Masood, Jerome K. Butler
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Patent number: 6801308Abstract: An apparatus for measuring chromatic dispersion in a waveguide uses a probe signal and a modulated pump signal which are coupled together into a waveguide. The modulated pump signal causes spatial and temporal Raman gain modulation of the probe signal. The amplitude of the pump signal is modulated and the frequency response of the probe signal at the output end of the waveguide is measured. The chromatic dispersion of the waveguide at a given wavelength is determined from the measurements. The probe signal is provided by a CW laser or corresponds to the ASE generated by the pump signal.Type: GrantFiled: February 21, 2003Date of Patent: October 5, 2004Assignee: JDS Uniphase, Inc.Inventors: Martin Achtenhagen, Idan Mandelbaum, Maxim Bolshtyansky
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Publication number: 20030151736Abstract: An apparatus for measuring chromatic dispersion in a waveguide uses a probe signal and a modulated pump signal which are coupled together into a waveguide. The modulated pump signal causes spatial and temporal Raman gain modulation of the probe signal. The amplitude of the pump signal is modulated and the frequency response of the probe signal at the output end of the waveguide is measured. The chromatic dispersion of the waveguide at a given wavelength is determined from the measurements. The probe signal is provided by a CW laser or corresponds to the ASE generated by the pump signal.Type: ApplicationFiled: February 21, 2003Publication date: August 14, 2003Inventors: Martin Achtenhagen, Idan Mandelbaum, Maxim Bolshtyansky
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Publication number: 20030086153Abstract: An apparatus for sensing changes, e.g. transient changes in the input or output signal spectrum of an optical amplifier, typically an EDFA, uses only a pair of spectrally banded photodiodes to equalize the transient behaviour of the amplifier. The photodiodes provide a control signal which is either sum or difference of signals generated by the photodiodes, that is used in the control of the optical amplifier in a feedback or feed-forward mode in order to counterbalance the effects of changes in the spectral content of the input (or output) signal of the optical amplifier.Type: ApplicationFiled: November 1, 2002Publication date: May 8, 2003Applicant: JDS Uniphase CorporationInventors: Idan Mandelbaum, Martin Achtenhagen, Donald R. Zimmerman, Stephen W. Arleth, Kao Yang Huang
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Publication number: 20020176070Abstract: An apparatus for measuring chromatic dispersion in a waveguide uses a CW laser probe signal and a modulated pump signal which are coupled together into a waveguide. The modulated pump signal causes spatial and temporal Raman gain modulation of the probe signal. The amplitude of the pump signal is modulated and the frequency response of the probe signal at the output end of the waveguide is measured. The chromatic dispersion of the waveguide at a given wavelength is determined from the measurements.Type: ApplicationFiled: July 23, 2001Publication date: November 28, 2002Applicant: JDS Uniphase CorporationInventors: Martin Achtenhagen, Idan Mandelbaum