Abstract: Provided are a surface emitting laser device having an optical sensor, and an optical waveguide device employing the same. The surface emitting laser device having an optical sensor includes a surface emitting laser formed on a substrate and generating a laser beam to output it to outside, and an optical sensor formed adjacent to the surface emitting laser on the substrate and receiving external light. In the surface emitting laser device having the optical sensor, and the optical waveguide device employing the same, the surface emitting laser and the optical sensor are simultaneously integrated, however, the performance of the surface emitting laser is unaffected by the optical sensor and the optical sensor operates separately, exhibits high performance, and can respond within a wide wavelength band.

Abstract: Disclosed herein is a compressor in which a coil weight is wound plural times on a highly vibrational portion of a discharge pipe to increase the mass of the highly vibrational portion, thereby enabling a vibrating frequency of the discharge pipe to be adjusted to a desired value. With this configuration, there is no need to coil up the discharge pipe plural times differently from the prior art. Thereby, the compressor exhibits an effective interior space utility, minimized malfunction rate, and low manufacturing costs.

Abstract: Provided is a structure for manufacturing an optical module for fixing optical components needed in modularizing an optical device applied to an optical communication, and contrary to the conventional structure, it is to provide a structure for attaching the optical components that can attach the optical components, such as a coupling lens, a collimator, and a mirror, to the exact place in both directions, and that can locate the lens to the place where the light outputting from the optical device can be precisely adjusted based on light usage, thereby obtaining good optical characteristics.

Abstract: Provided is an optical transceiver for reducing crosstalk, comprising a light signal transmitter, a photoelectric transducer having a light transmitting device that converts the electrical signal into the light signal for transmission and a light receiving device that converts a received light signal into an electrical signal, and an electronic component that is located on a PCB connected to a leadframe or inside the optical transceiver module and amplifies, modulates, and demodulates the electrical signals in receiving and transmitting, whereby it is possible to implant the crosstalk level of less than ?90 dB capable of retaining the reception sensitivity to ?26 dBm in the optical transceiver, by forming the dummy ground lines on the substrate to reduce the crosstalk between the light transmitting device and the receiving device mounted on the silicon substrate.