Abstract:
A double core spot size converter which is an optical transmit-receive device which is used as an important part in the field related to optical communications and a method for fabricating the double core spot size converter are provided. The double core spot size converter has a double core structure including a lower passive waveguide and an upper passive waveguide and active waveguide, between which a spacer having a thickness of about 0.3 &mgr;m is interleaved. According to the method, the upper passive waveguide is simultaneously grown along with the active waveguide through a selective area growth (SAG) method using a SAG pattern such that a negative taper structure, in which the thickness gradually becomes thinner from the active waveguide toward a beam emitting facet, is formed and a composition is different according to the thickness.
Abstract:
A merged semiconductor device having a DRAM and an SRAM, and a data transmitting method using the same are provided. In this device, the DRAM acts as a main memory, and the SRAM acts as a cache memory. The reading operation of the DRAM, and the writing operation of the SRAM are simultaneously controlled by a DRAM read control signal. Also, the writing operation of the DRAM, and the reading operation of the SRAM are simultaneously controlled by a DRAM write control signal. In this device, DRAM write commands and DRAM read commands can be continuously given. Writing of the SRAM starts after reading of the DRAM is completed, and writing of the DRAM starts after reading of the SRAM is completed.
Abstract:
There is provided a method for a purification of trichlorosilane, the method including: performing a pretreatment for separating a chlorosilane mixture from reaction products of a trichlorosilane production reaction; performing a first purification for separating the chlorosilane mixture into a first top stream and a first bottom stream; performing a second purification for separating the first top stream into a second top stream and a second bottom stream; and performing a third purification for separating the second bottom stream into a third top stream and a third bottom stream, wherein the performing of the third purification is carried out under pressure conditions higher than those of the performing of the second purification, and a heat exchange is generated between the second bottom stream and the third top stream.
Abstract:
A mobile input device of a mobile terminal includes: a selection unit for selecting an application program of the mobile terminal; an execution instruction unit for generating an instruction to execute the application program; and a wireless communication unit for transmitting the instruction to execute to the mobile terminal, wherein the mobile input device inputs information to the executed application program.
Abstract:
A multi-functional pen apparatus and a method for using the multi-functional pen are provided. The method includes switching an operation mode of the multi-functional pen to a pen mode according to a predetermined key input; receiving pen data in the switched pen mode; and transmitting the pen data to a portable terminal, wherein the portable terminal transmits a call based on the transmitted pen data.
Abstract:
An optical module comprises a waveguide, at least one optical transducer positioned on the waveguide for transducing an optical signal into an electric signal or an electric signal into an optical signal and a connection socket seated on the waveguide, the optical transducer being mounted in the connection socket.
Abstract:
Provided are an optical active device and optical module using the same The optical active device includes first face through which light received emitted, second face facing the first face third face adjacent the first face and the second face, and fourth face facing the third face which width between the first face and the second face equal greater than distance between the third face and the fourth face
Abstract:
A broadband light source is disclosed. The broadband light source includes a semiconductor optical amplifier for generating and amplifying light of a broadband wavelength, the amplifier having a first end and a second end and a mirror spaced from the second end of the semiconductor optical amplifier to reflect the light, which is provided by the semiconductor optical amplifier, back to the semiconductor optical amplifier, wherein the semiconductor optical amplifier amplifies the light reflected from the mirror and outputs the amplified light to the first end of the semiconductor optical amplifier. The light source further including at least one lens system to converge light passing through the amplifier ends.
Abstract:
A broadband light source includes: at least two semiconductor optical active devices for generating TE polarized lights of different wavelength bands; an optical coupler for dividing each of the TE polarized lights input from each of the semiconductor optical active devices into two TE polarized lights, and outputting the two TE polarized lights, the two TE polarized lights including a first TE polarized light and a second TE polarized light; a first optical line for transmitting the first TE polarized light, while maintaining a polarization mode of the first TE polarized light; a second optical line for converting the second TE polarized light into a TM polarized light; a polarization beam combiner for combining the first TE polarized light and the TM polarized light to generate a polarization-independent light; and a band separator for separating and outputting the polarization-independent light according to wavelength bands.
Abstract:
A multi-channel light source includes a semiconductor optical amplifier for generating light of a wide wavelength band and outputting the generated light through a first end and a second end. The source further includes a Fabry-Perot (FP) resonator for resonating the light inputted from the semiconductor optical amplifier to generate an FP fringe and outputting the FP fringe to the semiconductor optical amplifier. The semiconductor optical amplifier amplifies the FP fringe inputted from the FP resonator and outputs the amplified FP fringe through the first end.