Abstract: Provided is a multichannel transmitter optical module which includes a plurality of light source units configured to generate light, a plurality of an electro-absorption modulators (EAMs) configured to modulate the generated light to an optical signal through a radio frequency (RF) signal, a plurality of RF transmission lines configured to apply the RF signal to the EAMs, and a combiner configured to combine the modulated optical signal. The RF transmission lines are connected to the EAMs in a traveling wave (TW) electrode manner. The multichannel transmitter optical module has alleviated crosstalk and is compactly integrated to have a small size.

Abstract: Disclosed is a transmitter optical module which includes an electro-absorption modulated laser modulating a light into an optical signal through a high-frequency electrical signal; a first sub-mount transferring the high-frequency signal to the electro-absorption modulated laser; and a second sub-mount receiving the high-frequency signal from the electro-absorption modulated laser to terminate the electro-absorption modulated laser. A length of a first wire connecting the first sub-mount and the electro-absorption modulated laser is different from a length of a second wire connecting the second sub-mount and the electro-absorption modulated laser.

Abstract: Disclosed is a transmitter optical module which includes a first package generating an optical signal; a second package bonded with the first package by using chip-to-chip bonding, having a silicon optical circuit platform structure, and amplifying the optical signal; and an optical waveguide forming a transmission path of the optical signal from the first package to the second package.

Abstract: An optical matrix switch includes connection optical waveguides, a 2×2 optical switch including two straight optical waveguides which are parallel to each other, two crossing optical waveguides which connects the insides of the straight optical waveguides and mutually intersects in an X shape, and electrodes which are disposed on portions where the straight optical waveguide and the crossing optical waveguide are connected.

Abstract: Provided is an optical module. The optical module includes: an optical bench having a first trench of a first depth and a second trench of a second depth that is lower than the first depth; a lens in the first trench of the optical bench; at least one semiconductor chip in the second trench of the optical bench; and a flexible printed circuit board covering an upper surface of the optical bench except for the first and second trenches, wherein the optical bench is a metal optical bench or a silicon optical bench.

Abstract: Provided is an optical comb generator including a light source, a first waveguide region, a modulation region, and a second waveguide region. The light source is configured to output single-mode light. The first waveguide region divides an output of the light source into first light and second light. The modulation region includes a first modulator and a second modulator modulating the first light and the second light respectively. The second waveguide region combines outputs of the first modulator and the second modulator to output an optical comb. Here, the first modulator and the second modulator respectively include a first quantum well and a second quantum well having an asymmetric structure with respect to each other. The light source, the first waveguide region, the modulation region, and the second waveguide region are integrated into one substrate.

Abstract: Provided are an optical switch device having a simple light path and capable of achieving high speed switching, and a method of manufacturing the optical switch device. The optical switch device comprises one or more first optical waveguides extending in a first direction, one or more second optical waveguides connected to the first optical waveguides in a second direction crossing the first direction, and one or more switching parts configured to control light transmitted in the first direction within the first optical waveguide connected with the second waveguide, to selectively reflect the light to the second waveguide extending in the second direction.

Abstract: Provided is a wavelength division multiplexer/demultiplexer having a flat wavelength response. In the wavelength division multiplexer/demultiplexer, a modified taper-shaped optical waveguide is interposed between an input waveguide and a first slab waveguide, such that the distribution of an optical signal input to an Arrayed Waveguide Grating (AWG) has a sinc-function shape. Thus, a flat wavelength response can be obtained in an output waveguide. In addition, the modified taper-shaped optical waveguide interposed to obtain a flat wavelength response has a small size and a simple structure, and thus can be applied to a conventional wavelength division multiplexer/demultiplexer without a design change.

Abstract: An optical communication device provided with digital optical switching includes a substrate; and at least one optical switch including a first optical switch composed of a main core disposed on the substrate and extending along a first direction, the main core including an optical input part and a transmission output part sequentially arranged along the first direction; a heater extending along a second direction to cross the main core; and a reflection output part extending along a third direction from a central point of the main core. The first direction and the second direction define a first angle there between, the second direction and the third direction define a second angle there between, and the first angle is equal to the second angle. An optical signal is outputted through the reflection output part or the transmission output part in response to heat from operation of the heater.

Abstract: Provided are an optical switch using a Mach-Zehnder interferometer and an optical switch matrix including the same. The optical switch includes a first coupler, an optical delay line, and a second coupler. The first coupler branches an optical signal transmitted to a first or second input waveguide into two optical signals. The optical delay line includes first and second arm waveguides of the same length transmitting the branched optical signal and a heater heating the first arm waveguide. The first and second arm waveguides have one of a full wavelength optical path difference and a half wavelength optical path difference according to whether the heater is turned on. The second coupler branches optical signals outputted from the optical delay line into two optical signals, respectively, and transmits the branched optical signals to the first or second output waveguide.

Abstract: Provided is an optical device. The optical device includes an optical waveguide comprising a core surrounded by a cladding, a light source providing light to the optical waveguide, and an optics system disposed between the optical waveguide and the light source, the optics system focusing the light emitted from the light source into the core of the optical waveguide and a portion of the cladding adjacent to the core.

Abstract: Provided is an optical communication device including optical switches. The optical communication device a first multi-mode core disposed on a substrate, the first multi-mode core extending in a first direction and second multi-mode cores disposed on a substrate, the second multi-mode cores parallelly extending in a second direction non-parallel to the first direction to intersect the first multi-mode core. The heaters respectively intersect intersectional regions between the first and second multi-mode cores.

Abstract: Provided is an optical device. The optical device includes a substrate having a waveguide region and a mounting region, a planar lightwave circuit (PLC) waveguide including a lower-clad layer and an upper-clad layer on the waveguide region of the substrate and a platform core between the lower-clad layer and the upper-clad layer, a terrace defined by etching the lower-clad layer on the mounting region of the substrate, the terrace including an interlocking part, an optical active chip mounted on the mounting region of the substrate, the optical active chip including a chip core therein, and a chip alignment mark disposed on a mounting surface of the optical active chip. The optical active chip is aligned by interlocking between the interlocking part of the terrace and the chip alignment mark of the optical active chip and mounted on the mounting region.

Abstract: Provided is an optical communication device including an optical switch. The optical communication device a main core including an optical input part and a transmission output part and a reflection output part disposed on a side of the main core. An optical signal is outputted through the reflection output part or the transmission output part according to an operation of a heater.

Abstract: Provided is a wavelength selective switch. The wavelength selective switch includes a first wavelength division multiplexer, an M number of optical switches, an (M+N?1) number of optical combiners, and a second wavelength division multiplexer. The first wavelength division multiplexer receives optical signals of an M number of wavelength channels to divide the received optical signals according to each channel, thereby outputting the divided optical signals. The M number of optical switches changes a path of on an optical signal outputted by an M number of wavelength channels from the first wavelength division multiplexer into one of an N number of output ports. The (M+N?1) number of optical combiners is respectively connected to the N number of output ports of the optical switches. The (M+N?1) number of optical combiners couple the N number of inputted optical signals to one output port. The second wavelength division multiplexer has an (M+N?1) number of input ports and an N number of output ports.

Abstract: Provided is a wavelength selective switch (WSS), and more particularly, a wavelength selective switch for electrically switching a wavelength without physical displacement. The wavelength selective switch includes an optical demultiplexer for dividing an input optical signal into signals having wavelengths corresponding to respective channels, selecting either the optical signal of each channel obtained by dividing the input optical signal or an optical signal input via an add port, and outputting the selected optical signal; and an optical multiplexer including an optical deflecting unit for individually deflecting the optical signals of the respective channels received from the optical demultiplexer according to supplied current or applied voltage, wherein the optical signal of each channel deflected by the optical deflecting unit is output to a specific output port.

Abstract: Provided is a wavelength division multiplexer/demultiplexer having a flat wavelength response. In the wavelength division multiplexer/demultiplexer, a modified taper-shaped optical waveguide is interposed between an input waveguide and a first slab waveguide, such that the distribution of an optical signal input to an Arrayed Waveguide Grating (AWG) has a sinc-function shape. Thus, a flat wavelength response can be obtained in an output waveguide. In addition, the modified taper-shaped optical waveguide interposed to obtain a flat wavelength response has a small size and a simple structure, and thus can be applied to a conventional wavelength division multiplexer/demultiplexer without a design change.

Abstract: Provided is an optical filtering apparatus which is applied to a Time Division Multiplexing Passive Optical Network (TDM-PON) based on a wavelength division multiplexing (WDM) method. The optical filtering apparatus includes: an optical signal distributing unit dividing an optical signal received from an optical line terminal into at least one optical signal with uniform output intensity, and distributing the at least one optical signal into at least one optical network unit; and a multiplexing unit combining a plurality of optical signals having different wavelengths received from the at least one optical network unit using a wavelength division multiplexing (WDM) method, and outputting the combined optical signal to the optical line terminal. Therefore, by using the optical filtering apparatus, it is possible to connect a large number of subscribers to an Optical Line Terminal (OLT) on a network such as Fiber To The Home (FTTH), thereby increasing efficiency in costs.

Abstract: Provided are a two-dimensional planar photonic crystal superprism device and a method of manufacturing the same, in which a manufacturing process is simplified using a nanoimprint lithography technique, and thus price-reduction and mass production are facilitated. The two-dimensional planar photonic crystal superprism device includes: a single-mode input waveguide comprising a straight waveguide having a taper structure and a bending waveguide; a superprism formed on an output end side of the single-mode input waveguide and comprising a slab and a photonic crystal superprism; and a single-mode output waveguide comprising a straight waveguide having a taper structure and a bending waveguide, and formed adjacent to the photonic crystal superprism. Using the two-dimensional planar photonic crystal superprism device, it is possible to facilitate manufacturing of nano-photonic integrated circuits, photonic crystal integrated circuits and nano-photonic systems.

Abstract: Provided are high power PLC optical Tx module and PLC optical Tx/Rx module. The PLC optical Tx/Rx module is located in an OLT of a PON system. The high power PLC optical Tx/Rx module includes a photodiode, a laser diode, an SOA, an optical coupler, and a PLC platform. The photodiode converts an input optical signal into an electrical signal, and the laser diode generates an optical signal of a predetermined wavelength. The SOA amplifies the optical signal generated by the laser diode, and the optical coupler couples optical signals, outputs the coupled signal to a splitter, divides an optical signal from the slitter, and outputs the divided signals to the photodiode. The PLC platform incorporates the photodiode, the laser diode, the SOA, and the optical coupler into one package to allow an optical signal to be output with high power.