Patents by Inventor Ho-Shang Lee
Ho-Shang Lee 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: 20230392768Abstract: A highly efficient light extraction system for LED chip arrays, in which a multi-function domed lens overlays the LED chip array. A lower portion of the multi-function domed lens acts as a reflector, capturing wide-angle light emitted by the LED chips. An upper portion of the multi-function domed lens provides the function of a refractive lens. The multi-function domed lens provides improved light extraction efficiency over prior art embodiments, greater total light output, as well as a narrower light distribution pattern, with increased light intensity at the center of the beam.Type: ApplicationFiled: August 15, 2022Publication date: December 7, 2023Applicant: DICON FIBEROPTICS, INC.Inventors: Jeffrey B. Lee, Tai-Chi Chu, Yen-Chih Liu, Ho-Shang Lee
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Patent number: 11409048Abstract: A tunable wavelength filtering device is presented in which the tuning mechanism is based on altering the incident angle to an optical thin film coating stack, or thin film optical filter. Rotating mirrors, such as Micro-Electro-Mechanical Systems (MEMS) tilt-mirrors, are used to alter the incident angle of the optical beam coming from an input fiber, and also to aim or align the exiting beam to an output optical fiber. The optical thin film coating stack can be implemented onto a glass substrate, to form a thin film filter chip. The thin film filter chip can be fixed in place, and the incident angle and exiting angle of the optical beam is varied by adjusting the tilt angle of the two rotating mirrors.Type: GrantFiled: December 20, 2019Date of Patent: August 9, 2022Assignee: DICON FIBEROPTICS, INC.Inventors: Jeffrey Lee, Junying Lu, Robert E. Schleicher, Ho-Shang Lee
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Patent number: 11154039Abstract: Examples of electrical lamp fixtures for illuminating terrariums and stimulating the growth and health of reptiles, amphibians, and birds, and specifically to an improved, compact light emitting diode (LED) terrarium light apparatus are described. The lighting apparatus can incorporate one or multiple extended point source LED arrays, such as composed of high brightness LEDs of multiple wavelengths, that provide spatially and spectrally controlled light. A compact, high brightness LED terrarium light apparatus for reptiles and birds, comprises an array of multiple LED chips that provides visible light, ultraviolet light, and (optionally) infrared light, with separate control of the various spectral components.Type: GrantFiled: January 18, 2019Date of Patent: October 26, 2021Assignee: DICON FIBEROPTICS, INC.Inventors: David Lowry, Jeffrey B. Lee, Robert E. Schleicher, Ho-Shang Lee
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Publication number: 20210302659Abstract: Wavelength-tuning optical filters are presented that also allows for the tuning or real-time adjustment of its bandwidth, or passband width. The bandwidth-adjustable tunable optical filters use one or more diffraction gratings that are fixed in place to provide angular dispersion of different wavelengths. A first rotatable or tilting mirror is used to adjust the angle of incidence of an input optical beam to the diffraction grating or diffraction grating system, while a second rotatable or tilting mirror is used to aim the diffracted optical beam back through the diffraction grating or diffraction grating system, so that a subset of the incoming wavelengths are optically aligned to the end face of an output fiber. The first rotatable or tilting mirror provides tuning or adjustment of the bandwidth or passband width of the tunable optical filter, while the second rotatable or tilting mirror tunes or adjusts the center wavelength of the passband.Type: ApplicationFiled: August 26, 2020Publication date: September 30, 2021Applicant: DICON FIBEROPTICS, INC.Inventors: Ho-Shang Lee, Jeffrey Lee
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Patent number: 11086074Abstract: Methods and techniques are presented to inhibit crystallization in optical waveguide structures, during high temperature annealing or deposition, thus preventing the formation of crystalline grains that scatter and/or absorb light. Dopant atoms or molecules are used to disrupt crystallization. The dopant atoms or molecules are selected to be transparent to the optical signal's wavelength range(s). Optical signals propagating in a waveguide that is fabricated with such techniques will experience reduced propagation loss or insertion loss. The passive dopants can also be used in active devices such as lasers or optical amplifiers that incorporate optically active dopants, as long as the passive dopants are chosen so that they do not interact with the active dopants.Type: GrantFiled: July 8, 2020Date of Patent: August 10, 2021Assignee: DICON FIBEROPTICS, INC.Inventors: Seng Fatt Liew, Yizhuo He, Ho-Shang Lee
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Publication number: 20210141159Abstract: A tunable wavelength filtering device is presented in which the tuning mechanism is based on altering the incident angle to an optical thin film coating stack, or thin film optical filter. Rotating mirrors, such as Micro-Electro-Mechanical Systems (MEMS) tilt-mirrors, are used to alter the incident angle of the optical beam coming from an input fiber, and also to aim or align the exiting beam to an output optical fiber. The optical thin film coating stack can be implemented onto a glass substrate, to form a thin film filter chip. The thin film filter chip can be fixed in place, and the incident angle and exiting angle of the optical beam is varied by adjusting the tilt angle of the two rotating mirrors.Type: ApplicationFiled: December 20, 2019Publication date: May 13, 2021Applicant: DICON FIBEROPTICS, INC.Inventors: Jeffrey Lee, Junying Lu, Robert E. Schleicher, Ho-Shang Lee
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Publication number: 20200229405Abstract: Examples of electrical lamp fixtures for illuminating terrariums and stimulating the growth and health of reptiles, amphibians, and birds, and specifically to an improved, compact light emitting diode (LED) terrarium light apparatus are described. The lighting apparatus can incorporate one or multiple extended point source LED arrays, such as composed of high brightness LEDs of multiple wavelengths, that provide spatially and spectrally controlled light. A compact, high brightness LED terrarium light apparatus for reptiles and birds, comprises an array of multiple LED chips that provides visible light, ultraviolet light, and (optionally) infrared light, with separate control of the various spectral components.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Applicant: DICON FIBEROPTICS, INC.Inventors: David Lowry, Jeffrey B. Lee, Robert E. Schleicher, Ho-Shang Lee
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Patent number: 10598857Abstract: A pin hole or aperture is located or formed adjacent to the end surface of one or more of the input ports or fibers, or adjacent to one or more of the output ports or fibers, of a fiberoptic component. The aperture allows light to enter (or exit) the core of the associated fiber, and the non-transparent layer that surrounds the aperture blocks light from entering or exiting the cladding layer of the associated fiber. This blocking of the evanescent field in the cladding layer serves to reduce the polarization, wavelength, and temperature dependencies of the light coupling to the output port(s) or fiber(s) of the optical component. It can also reduce the passband width of the selected wavelength in tunable optical filter applications. The non-transparent layer surrounding the aperture can be made reflective, and light that is reflected by the non-transparent layer can be used for optical power monitoring.Type: GrantFiled: December 19, 2018Date of Patent: March 24, 2020Assignee: DICON FIBEROPTICS, INC.Inventors: Ho-Shang Lee, Min Chieh Lu, Yu-Sheng Yang, Chen-Wen Ho
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Patent number: 10547155Abstract: A solid-state optical amplifier is described, having an active core and doped cladding in a single chip. An active optical core runs through a doped cladding in a structure formed on a substrate. A light emitting structure, such as an LED, is formed within and/or adjacent to the optical core. The cladding is doped, for example, with erbium or other rare-earth elements or metals. Several exemplary devices and methods of their formation are given.Type: GrantFiled: September 12, 2017Date of Patent: January 28, 2020Assignee: DICON FIBEROPTICS, INC.Inventor: Ho-Shang Lee
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Patent number: 10429590Abstract: A rotating or tilting MEMS structure, such as a tilt mirror for an optical device, includes a damping mechanism, provided by locating an inlay block structure underneath the MEMS rotating surface. Damping is created by the temporary squeezing or compression of the air, atmosphere, or gas(es) surrounding the MEMS structure, between the underside of the MEMS tilting surface and the top surface of the block. Movement of the MEMS surface away from the top surface of the block will also be damped by the temporary reduction in pressure. The block structure is fabricated separately from the MEMS tilt-mirror structure and located under the MEMS tilt-mirror structure, either before or during the die-attach or die-bonding process. The damping effect serves to minimize and limit the amplitude and duration of oscillatory motion of the MEMS tilt-mirror, following intentional movement of the mirror, or, in response to external shock and vibrational forces.Type: GrantFiled: June 26, 2018Date of Patent: October 1, 2019Assignee: DICON FIBEROPTICS, INC.Inventors: Ho-Shang Lee, Rong Ping Hsia
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Patent number: 10429591Abstract: Integrated optical component combine the functions of a Variable Optical Attenuator (VOA), a tap coupler, and a photo-detector, reducing the size, cost, and complexity of these functions. In other embodiments, the integrated optical component combines the functions of an optical switch, a tap coupler, and a photo-detector. A rotatable mirror is used to adjust the coupling of light from an input port or ports to one or more output ports. A pin hole with a surrounding reflective surface is used at the core end face of one or more output fibers, such that a portion of the output optical signal is reflected to a photodiode chip. The photo-detector provides an indication of the optical power that is being coupled to the output fiber. With appropriate electronic control circuitry, the integrated optical component can be used to set the output optical power at a desired or required level.Type: GrantFiled: June 16, 2016Date of Patent: October 1, 2019Assignee: DICON FIBEROPTICS, INC.Inventors: Ho-Shang Lee, Brian Chiang
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Patent number: 10416401Abstract: In-line uni-directional optical tap detector devices provide optical power monitoring in a small, inexpensive form factor. A pair of optical fibers with angled end surfaces are fusion-spliced or butt-coupled together, with a thin-film coating or coating stack positioned in between the two fiber end surfaces. The thin-film coating or coating stack acts as an optical tap, reflecting a small portion of the optical signal towards a photo-detector affixed to the exterior of the cladding of the fibers, positioned and angled such that the photo-detector measures the optical power of signals propagating in one direction down the fibers, while ignoring signals propagating in the opposite, or reverse direction. Alternately, a V-groove block or fiber holder is used to position and secure the fibers, without requiring fusion splicing, where the reflection of a portion of the optical signal to the photo-detector may be due to Fresnel reflection at the fiber end surfaces.Type: GrantFiled: December 19, 2017Date of Patent: September 17, 2019Assignee: DICON FIBEROPTICS, INC.Inventor: Ho-Shang Lee
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Publication number: 20190162921Abstract: In-line uni-directional optical tap detector devices provide optical power monitoring in a small, inexpensive form factor. A pair of optical fibers with angled end surfaces are fusion-spliced or butt-coupled together, with a thin-film coating or coating stack positioned in between the two fiber end surfaces. The thin-film coating or coating stack acts as an optical tap, reflecting a small portion of the optical signal towards a photo-detector affixed to the exterior of the cladding of the fibers, positioned and angled such that the photo-detector measures the optical power of signals propagating in one direction down the fibers, while ignoring signals propagating in the opposite, or reverse direction. Alternately, a V-groove block or fiber holder is used to position and secure the fibers, without requiring fusion splicing, where the reflection of a portion of the optical signal to the photo-detector may be due to Fresnel reflection at the fiber end surfaces.Type: ApplicationFiled: December 19, 2017Publication date: May 30, 2019Applicant: DICON FIBEROPTICS, INC.Inventor: Ho-Shang Lee
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Publication number: 20190146156Abstract: A pin hole or aperture is located or formed adjacent to the end surface of one or more of the input ports or fibers, or adjacent to one or more of the output ports or fibers, of a fiberoptic component. The aperture allows light to enter (or exit) the core of the associated fiber, and the non-transparent layer that surrounds the aperture blocks light from entering or exiting the cladding layer of the associated fiber. This blocking of the evanescent field in the cladding layer serves to reduce the polarization, wavelength, and temperature dependencies of the light coupling to the output port(s) or fiber(s) of the optical component. It can also reduce the passband width of the selected wavelength in tunable optical filter applications. The non-transparent layer surrounding the aperture can be made reflective, and light that is reflected by the non-transparent layer can be used for optical power monitoring.Type: ApplicationFiled: December 19, 2018Publication date: May 16, 2019Applicant: DICON FIBEROPTICS, INC.Inventors: Ho-Shang Lee, Min Chieh Lu, Yu-Sheng Yang, Chen-Wen Ho
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Patent number: 10243315Abstract: A solid-state optical amplifier chip is described, with improved pumping, in which pump light from one or more solid-state light sources is coupled efficiently into the doped areas of the chip, resulting in amplification of an optical signal. The optical signal is carried in the core of an optical waveguide. Rare-earth elements are used as dopants, primarily in the cladding of the optical signal's waveguide core, in order to provide amplification of the optical signal through stimulated emission. A variety of waveguide structures are described for routing and distributing the pump light to the doped areas of the chip.Type: GrantFiled: September 27, 2017Date of Patent: March 26, 2019Assignee: DICON FIBEROPTICS, INC.Inventors: Seng Fatt Liew, Ho-Shang Lee
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Patent number: 10197738Abstract: A Micro-Electro-Mechanical Systems (MEMS) actuator can rotate other, discrete optical elements that may be dimensionally large (especially in terms of thickness), may be of relatively large mass, and may be made of dissimilar materials (i.e., some material other than silicon). The rotating optical element may be reflective or transmissive. The MEMS actuator is used in multiple additional embodiments, allowing the integration of multiple optical functions into a single optical component, for a variety of applications. These optical functions include optical switching, optical attenuation, tunable optical filtering, the adjustment of the phase angle of an optical signal, and the detection or receiving of an optical signal or optical power level.Type: GrantFiled: July 20, 2017Date of Patent: February 5, 2019Assignee: DICON FIBEROPTICS, INC.Inventors: Jeffrey B. Lee, Rong Ping Hsia, Robert E. Schleicher, Ho-Shang Lee
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Publication number: 20190020169Abstract: A solid-state optical amplifier chip is described, with improved pumping, in which pump light from one or more solid-state light sources is coupled efficiently into the doped areas of the chip, resulting in amplification of an optical signal. The optical signal is carried in the core of an optical waveguide. Rare-earth elements are used as dopants, primarily in the cladding of the optical signal's waveguide core, in order to provide amplification of the optical signal through stimulated emission. A variety of waveguide structures are described for routing and distributing the pump light to the doped areas of the chip.Type: ApplicationFiled: September 27, 2017Publication date: January 17, 2019Applicant: DICON FIBEROPTICS, INC.Inventors: Seng Fatt Liew, Ho-Shang Lee
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Publication number: 20180329147Abstract: A Micro-Electro-Mechanical Systems (MEMS) actuator can rotate other, discrete optical elements that may be dimensionally large (especially in terms of thickness), may be of relatively large mass, and may be made of dissimilar materials (i.e., some material other than silicon). The rotating optical element may be reflective or transmissive. The MEMS actuator is used in multiple additional embodiments, allowing the integration of multiple optical functions into a single optical component, for a variety of applications. These optical functions include optical switching, optical attenuation, tunable optical filtering, the adjustment of the phase angle of an optical signal, and the detection or receiving of an optical signal or optical power level.Type: ApplicationFiled: July 20, 2017Publication date: November 15, 2018Applicant: DICON FIBEROPTICS, INC.Inventors: Jeffrey B. Lee, Rong Ping Hsia, Robert E. Schleicher, Ho-Shang Lee
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Patent number: 9998252Abstract: In one embodiment, each of the output/input ports of each one of a plurality of optical splitters is connected to one of a plurality of optical switches by means of optical fibers without any fusion splicing in a majority of the optical fibers, and each of the input/output ports of each one of the switches is connected to one of the optical splitters by means of the optical fibers without any fusion splicing in a majority of the optical fibers. Each of the output/input ports of each one of the optical splitters may be directly connected to the ferrule and one of the input/output ports of one of the switches by the optical fibers. The optical splitters may be implemented in at least one planar lightwave circuit (PLC) chip. Optionally, at least one fiber holder defining a plurality of channels therein may be used to hold the optical fibers each of which is aligned with a corresponding output/input port of one of the optical splitters.Type: GrantFiled: September 25, 2014Date of Patent: June 12, 2018Assignee: DICON FIBEROPTICS, INC.Inventor: Ho-Shang Lee
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Publication number: 20180131154Abstract: A solid-state optical amplifier is described, having an active core and doped cladding in a single chip. An active optical core runs through a doped cladding in a structure formed on a substrate. A light emitting structure, such as an LED, is formed within and/or adjacent to the optical core. The cladding is doped, for example, with erbium or other rare-earth elements or metals. Several exemplary devices and methods of their formation are given.Type: ApplicationFiled: September 12, 2017Publication date: May 10, 2018Applicant: DICON FIBEROPTICS, INC.Inventor: Ho-Shang Lee