Patents by Inventor Janne Konttinen
Janne Konttinen 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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Publication number: 20230236413Abstract: The invention relates to an opto-mechanical scanning device (100) arranged for deflecting an incident light beam (191). The scanning device comprises first and second reflective surfaces (M1, M2), a transparent, deformable, non-fluid body (110) having a refractive index which is greater than the refractive index of air, an actuator system (120) arranged to move the first reflective surface (M1) so that an angle of the first reflective surface (M1) is adjustable, a first window (131) arranged to receive and transmit the at least one incident light beam into the non-fluid body, a second window (132) arranged to receive and transmit the at least one incident light beam out of the non-fluid body. The first and second windows are arranged adjacent to the non-fluid body with the second reflective surface (M2) arranged so that the incident light beam can be transmitted out of the non-fluid body after being reflected successively by the first and second reflective surfaces.Type: ApplicationFiled: June 29, 2021Publication date: July 27, 2023Inventors: Janne Konttinen, Pierre Craen, Janne Tapani Kilpinen
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Publication number: 20130321900Abstract: A device including a combination of a waveguide and a grating arranged to provide a spectral reflectance. The grating has a plurality of diffractive features in a first region and in a second region such that in the first region, a local average of a length of a period of the diffractive features substantially increases with increasing distance from an origin, and in the second region, the local average of the length of the period of the diffractive features substantially decreases with increasing distance from an origin. The origin is located at an end of the device.Type: ApplicationFiled: December 1, 2011Publication date: December 5, 2013Applicant: EpiCrystals OyInventors: Tuomas Vallius, Janne Konttinen, Pietari Tuormisto
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Publication number: 20130314766Abstract: A nonlinear crystal includes a plurality of poled zones implemented in a nonlinear material. The crystal has a first region and a second region. In the first region, the local average of a length of a period of the poled zones substantially increases with increasing distance from an origin. In the second region, the local average of the length of the period of the poled zones substantially decreases with increasing distance from the origin. The origin is located at an end of the crystal.Type: ApplicationFiled: December 1, 2011Publication date: November 28, 2013Applicant: EpiCrystals OyInventors: Tuomas Vallius, Janne Konttinen, Pietari Tuomisto
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Patent number: 8264765Abstract: A light source including a light emitting unit, a nonlinear medium, and a resonant grating. The light emitting unit is arranged to emit a first light into the nonlinear medium. The nonlinear medium is arranged to generate a second light such that an optical frequency of the second light is higher than an optical frequency of the first light. The resonant grating is arranged to stabilize an optical frequency of the first light by providing optical feedback to the light emitting unit.Type: GrantFiled: August 31, 2010Date of Patent: September 11, 2012Assignee: EpiCrystals OyInventors: Tuomas Vallius, Pietari Tuomisto, Janne Konttinen
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Patent number: 7944958Abstract: A light emitting device including a waveguide having an electrically pumped gain region, a saturable absorber, a nonlinear crystal, an inclined mirror, and a light-concentrating structure. Light pulses emitted from the gain region are reflected by the inclined mirror and focused by the light-concentrating structure into the nonlinear crystal in order to generate frequency-converted light pulses. The gain region, the saturable absorber, the light-concentrating structure and the inclined mirror are implemented on or in a common substrate. The resulting structure is stable and compact, and allows on-wafer testing of produced emitters. The folded structure allows easy alignment of the nonlinear crystal.Type: GrantFiled: January 17, 2008Date of Patent: May 17, 2011Assignee: EpiCrystals OyInventors: Janne Konttinen, Pietari Tuomisto, Tomi Jouhti
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Publication number: 20110051226Abstract: A light source including a light emitting unit, a nonlinear medium, and a resonant grating. The light emitting unit is arranged to emit a first light into the nonlinear medium. The nonlinear medium is arranged to generate a second light such that an optical frequency of the second light is higher than an optical frequency of the first light. The resonant grating is arranged to stabilize an optical frequency of the first light by providing optical feedback to the light emitting unit.Type: ApplicationFiled: August 31, 2010Publication date: March 3, 2011Applicant: EpiCrystals OyInventors: Tuomas VALLIUS, Pietari Tuomisto, Janne Konttinen
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Patent number: 7801197Abstract: The invention is a single-crystal passively mode-locked semiconductor vertical-external-cavity surface-emitting laser (VECSEL). The device can be a single emitter or an array of emitters. The VECSEL structure is grown on a GaAs, InP or GaSb substrate. The device consists of an active region with a number of quantum wells (QW) made of GaInAs, GaInAsP, GaInNAs, GaInNAsSb, AlGaAs or GaAsP. The fundamental lasing wavelength is chosen by the gain material. The gain region is sandwiched between the bottom reflector with reflectivity close to 100% and a partial reflector. A semiconductor spacer layer made of e.g. GaAs or AlGaAs is separating the gain region and a semiconductor saturable absorber. The saturable absorber consists of one or more quantum wells made of GaInAs, GaInAsP, GaInNAs, GaInNAsSb, AlGaAs or GaAsP and a second partial reflector.Type: GrantFiled: June 16, 2006Date of Patent: September 21, 2010Assignee: Epicrystals OyInventor: Janne Konttinen
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Publication number: 20100142570Abstract: A light emitting device including a waveguide having an electrically pumped gain region, a saturable absorber, a nonlinear crystal, an inclined mirror, and a light-concentrating structure. Light pulses emitted from the gain region are reflected by the inclined minor and focused by the light-concentrating structure into the nonlinear crystal in order to generate frequency-converted light pulses. The gain region, the saturable absorber, the light-concentrating structure and the inclined minor are implemented on or in a common substrate. The resulting structure is stable and compact, and allows on-wafer testing of produced emitters. The folded structure allows easy alignment of the nonlinear crystal.Type: ApplicationFiled: January 17, 2008Publication date: June 10, 2010Applicant: EpiCrystals OyInventors: Janne Konttinen, Pietari Tuomisto, Tomi Jouhti
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Patent number: 7660500Abstract: A light emitting device including an array of light emitters to emit first light pulses. Each of the light emitters includes a saturable absorber and a waveguide having an electrically pumped gain region to emit the first light pulses. At least one reflector structure reflects the first light pulses into a nonlinear crystal by changing the direction of the first light pulses by an angle that is in a range of 70 to 110 degrees. The reflector structure includes a sub-wavelength grating structure to change the polarization of the first light pulses. A nonlinear crystal generates second light pulses such that the optical frequency of the second light pulses is two times the optical frequency of the first light pulses.Type: GrantFiled: May 22, 2007Date of Patent: February 9, 2010Assignee: EpiCrystals OyInventors: Janne Konttinen, Tomi Jouhti, Pietari Tuomisto
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Publication number: 20080291951Abstract: A light emitting device including an array of light emitters to emit first light pulses. Each of the light emitters includes a saturable absorber and a waveguide having an electrically pumped gain region to emit the first light pulses. At least one reflector structure reflects the first light pulses into a nonlinear crystal by changing the direction of the first light pulses by an angle that is in a range of 70 to 110 degrees. The reflector structure includes a sub-wavelength grating structure to change the polarization of the first light pulses. A nonlinear crystal generates second light pulses such that the optical frequency of the second light pulses is two times the optical frequency of the first light pulses.Type: ApplicationFiled: May 22, 2007Publication date: November 27, 2008Applicant: EpiCrystals OyInventors: Janne Konttinen, Tomi Jouhti, Pietari Tuomisto
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Publication number: 20080175284Abstract: A light emitting device comprises a waveguide having an electrically pumped gain region, a nonlinear medium, and an inclined mirror. Light pulses emitted from the gain region are reflected by the inclined mirror into the nonlinear medium in order to generate frequency-doubled light pulses. The gain region and the inclined mirror are implemented on the same substrate. The resulting structure is stable and compact, and allows on-wafer testing of produced emitters. The folded structure allows easy alignment of the nonlinear crystal.Type: ApplicationFiled: January 18, 2007Publication date: July 24, 2008Applicant: EpiCrystals OyInventors: Janne Konttinen, Pietari Tuomisto, Tomi Jouhti
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Patent number: 7394841Abstract: A light emitting device comprises a waveguide having an electrically pumped gain region, a nonlinear medium, and an inclined mirror. Light pulses emitted from the gain region are reflected by the inclined mirror into the nonlinear medium in order to generate frequency-doubled light pulses. The gain region and the inclined mirror are implemented on the same substrate. The resulting structure is stable and compact, and allows on-wafer testing of produced emitters. The folded structure allows easy alignment of the nonlinear crystal.Type: GrantFiled: January 18, 2007Date of Patent: July 1, 2008Assignee: EpiCrystals OyInventors: Janne Konttinen, Pietari Tuomisto, Tomi Jouhti
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Publication number: 20070291799Abstract: The invention is a single-crystal passively mode-locked semiconductor vertical-external-cavity surface-emitting laser (VECSEL). The device can be a single emitter or an array of emitters. The VECSEL structure is grown on a GaAs, InP or GaSb substrate. The device consists of an active region with a number of quantum wells (QW) made of GaInAs, GaInAsP, GaInNAs, GaInNAsSb, AlGaAs or GaAsP. The fundamental lasing wavelength is chosen by the gain material. The gain region is sandwiched between the bottom reflector with reflectivity close to 100% and a partial reflector. A semiconductor spacer layer made of e.g. GaAs or AlGaAs is separating the gain region and a semiconductor saturable absorber. The saturable absorber consists of one or more quantum wells made of GaInAs, GaInAsP, GaInNAs, GaInNAsSb, AlGaAs or GaAsP and a second partial reflector.Type: ApplicationFiled: June 16, 2006Publication date: December 20, 2007Inventor: Janne Konttinen