Abstract: A TO-type optical element package for high-speed communication which is used for an optical module for high-speed communication of at least 10 gigabits per sec (Gbps) and enables thermoelectric elements to be embedded in an upper part of a stem. The TO-type optical element package for high-speed communication can transmit high-quality signals in a high-speed operation of the optical element by inserting and fixing an electrode pin (120) in a through-hole formed on a stem base (100), surrounding a lateral surface of the electrode pin (120) protruding to an upper part of the stem base (100), with a metallic instrument (400) having a through-hole so as to enable the impedance of an electrode pin (120) part, surrounded with the stem base (100), to correspond to the impedance of an electrode pin (120) part protruding to the upper part of the stem base (100).

Abstract: Embodiments of the present invention are directed to a condensed-cyclic compound and an OLED including the same.

Abstract: A technology of effectively interrupting light reflected from a wavelength selective filter so as not to be fed back to a laser diode chip in a semiconductor laser package having a function of adjusting a relative intensity ratio of a signal of “1” and a signal of “0” using an optical filter. Since an optical interruption device may effectively interrupt a light feedback to the laser diode chip by adjusting characteristics of a 45 degree partial reflection mirror in an existing TO-can type laser device having the 45 degree partial reflection mirror and additionally disposing one ?/4 waveplate, unlike previously known optical isolators using an existing Faraday rotator, the signals of “1” and “0” may be effectively adjusted in a TO-can type laser device having a small volume, thereby improving a function of communication.

Abstract: Provided is a current collector including a laminate in which a conductive substrate and an insulator are laminated, wherein the insulator is a porous insulator formed with an open pore channel penetrating through the insulator. The current collector may be used as a current collector for an electrode of a secondary battery and stably maintain capacity of the secondary battery at the time of repeating charge and discharge cycles.

Abstract: Provided is a sodium secondary battery including: a sodium ion conductive solid electrolyte separating an anode space and a cathode space from each other; an anode positioned in the anode space and containing sodium; a cathode solution positioned in the cathode space; and a cathode immersed in the cathode solution and including graphite felt formed with open pore channel of which an opening part is formed on a surface of the graphite felt facing the solid electrolyte.

Abstract: A method for transmitting contents including tracking information is described. The method comprising the steps of generating a content transmission stream relevant to an original content, determining at least part of the original content as a forensic mark (FM) target segment, generating a FM stream including the FM segment in which a particular pattern is inserted into the FM target segment and a FM stream different from the content transmission stream and transmitting the content transmission stream and the FM stream to a receiving device, wherein the FM stream is combined with the content transmission stream based on session information related to the transmitting in the receiving device.

Abstract: The present invention relates to a pharmaceutical composition for treating and preventing degenerative neurological disorders, containing, as an active ingredient, a mixture extract of two or more types selected from the group consisting of Moutan Root Bark, Angelica Dahurica Root, and Bupleurum Root, or a fraction thereof.

Abstract: Provided are a solid electrolyte for a sodium secondary battery, and a surface treatment method thereof, and more specifically, a solid electrolyte for a sodium secondary battery capable of having excellent electrochemical performance by improving wettability with respect to molten sodium, even under a low temperature operation environment of 250° C. or less, and a surface treatment method thereof.

Abstract: The present invention relates to an external cavity type laser provided with a wavemeter capable of precisely measuring a wavelength of a laser beam based on a transmission wavelength band of a wavelength selective filter inserted into a cavity regardless of a driving current of a laser diode chip.

Abstract: The present invention relates to a wavelength-tunable laser, which can tune an oscillating laser wavelength and can be manufactured in a small size, comprising: a laser diode chip (100) for emitting a laser beam; a partial reflection mirror (500) for optical feedback, which partially reflects the beam emitted from the laser diode chip (100) so as to enable the reflected beam to be fed back to the laser diode chip (100); a collimation lens (200) provided on an optical path between the laser diode chip (100) and the partial reflection mirror (500) for optical feedback so as to collimate the beam emitted from the laser diode chip (100); a wavelength-tunable selective filter (300) for converting the wavelength transmitted according to the temperature; a phase compensator (350) of which a refractive index is changed according to the temperature and which offsets a change in the refractive index according to the temperature of the semiconductor laser diode chip (100) or the wavelength-tunable selective filter (300)

Abstract: Provided is a sodium secondary battery including a graphite felt having a maximum porosity on a surface facing a solid electrolyte and a decreased porosity in a thickness direction, as a cathode current collector impregnated with an electrolyte.

Abstract: Provided is a sodium secondary battery capable of operating at a low temperature. More particularly, the sodium secondary battery according to the present invention includes: an anode containing sodium; a cathode containing a transition metal and an alkali metal halide; and a sodium ion conductive solid electrolyte provided between the anode and the cathode, wherein the cathode is impregnated in a molten salt electrolyte containing a sodium.metal halogen salt including at least two kinds of halogens.

Abstract: A light receiving module having a built-in wavelength-tunable wavelength-selective filter that can selectively receive light with a specific wavelength from laser light with various wavelengths emitted from an optical fiber and tune the specific wavelength. In the light receiving module including a light receiving element having a built-in wavelength-tunable wavelength-selective filter that receives laser light from an optical fiber according to the present invention, a flat plate-shaped window (240) transmitting laser light from an optical fiber (600) is formed in the light receiving element (22), a wavelength-tunable wavelength-selective filter for separating wavelengths of laser light traveling as parallel light is disposed in the light receiving element (22), and a lens (400) converting laser light from the optical fiber (600) into parallel light is disposed between the optical fiber (600) and the light receiving element (22).

Abstract: There is provided a method for measuring a temperature using a thermistor with which it is possible to precisely measure a temperature above a thermoelectric device by using a thermistor disposed on the thermoelectric device in a module for controlling a temperature of a component arranged on the thermoelectric device by using the thermoelectric device. In the method for measuring a temperature using a thermistor, by electrically connecting the thermistor to an electrode pin through a thermoelectric device or a bridge sub-mount mounted on the thermoelectric device when electrically connecting a top surface of the thermistor and the electrode pin, it is possible to suppress direct heat exchange between the thermistor and the electrode pin. Further, it is possible to effectively suppress heat exchange between the thermistor and a package lid by internal gas of a package by covering the thermistor with a polymer material, such as an epoxy having low thermal transmittance.

Abstract: A semiconductor laser device which comprises a laser diode chip (100) that emits laser light; a 45° reflective mirror (400) that changes laser light traveling horizontally to a package bottom into laser light traveling perpendicular to the package bottom. The 45° reflective mirror (400) is a partial reflective mirror which has a partial reflection/partial transmission characteristic. An optical feedback-partial reflective mirror (500) is disposed along a path of light passing vertically through the 45° reflective mirror (400). The optical feedback-partial reflective mirror (500) supplies some of the laser light traveling through the 45° reflective mirror (400) back to the 45° reflective mirror 400 by reflecting a first portion of the laser light while transmitting a remaining portion of the laser light.

Abstract: A device disclosed herein includes a plurality of spaced-apart fin structures formed in a semiconductor substrate so as to define an alignment/overlay mark trench. An alignment/overlay mark includes at least one insulating material positioned within the alignment/overlay mark trench. The alignment/overlay mark is devoid of any of the fin structures.

Abstract: A TO type laser device that can perform long-distance transmission due to a reduced line breadth of laser light. A semiconductor laser device which comprises a laser diode chip (100) that emits laser light; a wavelength-selective filter; a collimating lens (200) disposed in a light path between the laser diode chip (100) and the wavelength-selective filter and to collimate light emitted from the laser diode chip (100); a 45°-partial reflective mirror (300) disposed in a light path between the laser diode chip (100) and the wavelength-selective filter for changing laser light traveling parallel to the bottom of a package into laser light traveling perpendicularly to the bottom of the package; and an optical wavelength supervisory photodiode (500) disposed in a light path along which laser light reflecting from the wavelength-selective filter, after being emitted from the laser diode chip (100), passes through the 45°-partial reflective mirror (300).

Abstract: A method for transmitting contents including tracking information is described. The method comprising the steps of generating a content transmission stream relevant to an original content, determining at least part of the original content as a forensic mark (FM) target segment, generating a FM stream including the FM segment in which a particular pattern is inserted into the FM target segment and a FM stream different from the content transmission stream and transmitting the content transmission stream and the FM stream to a receiving device, wherein the FM stream is combined with the content transmission stream based on session information related to the transmitting in the receiving device.

Abstract: A content stream transmission apparatus with reverse traceability comprises a pattern insertion unit dividing the original content in units of segments and inserting at least two patterns to each segment and creating at least two pattern contents; an encryption unit encrypting the at least two pattern contents; a content selection unit selecting one of the at least two pattern contents based on user identification information; and a transmission unit transmitting the selected pattern content to a user device. Therefore, as copyright and leakage tracking information are enabled to be inserted into the contents in real-time, the present invention not only provides security-enhanced contents but also services real-time content streaming services.

Abstract: Provided is a Na based secondary battery including: an anode containing sodium or a sodium alloy; a cathode containing a metal halide, which is a halide of at least one metal selected from a group consisting of alkali metals, transition metals, and Groups 12 to 14 metals, and a solvent dissolving the metal halide; and a sodium ion conductive solid electrolyte separating the cathode and the anode from each other.