Abstract:
기존 광대역 테라헤르츠 분광시스템의 핵심부품인 PCA 및 포토믹서의 현존하는 제한적인 요소를 근본적으로 해결한 포토믹서 및 그의 제조방법을 제시한다. 제시된 포토믹서는 기판의 상면에 형성되되 광이 입사되는 영역에 형성된 활성층, 및 기판의 상면에 형성되되 광이 입사되는 영역을 제외한 나머지 영역에 형성된 열전도층을 포함한다. 활성층은 메사형 단면을 갖도록 형성되고, 열전도층은 광이 입사되는 영역을 제외한 영역에 MOCVD법으로 재성장되어 평탄화된 표면을 갖게 된다.
Abstract:
The present invention relates to a beating signal monitoring module, and a terahertz wave generator and an optical signal monitoring device including the same. The beating signal monitoring module according to the present invention comprises: a non-linear unit for generating an optical signal, including four wave mixing (FWM) light, in response to a beating signal generated based on first and second light; a filter unit for separating the FWM light from the optical signal and outputting the separated FWM light; and a monitoring unit for monitoring the beating signal by using the separated FWM light. According to the beating signal monitoring module, and the terahertz wave generator and the optical signal monitoring device including the same of the present invention, the beating signal generated by using two lasers can be efficiently monitored by using the FWM signal.
Abstract:
The present invention relates to a terahertz wave generating module and a terahertz wave detecting device including the same. The terahertz wave generating module according to the present invention comprises: a bidirectional light source which provides a first dual-mode beam in a first direction and a second dual-mode beam in a second direction; a forward lens unit which focuses the first dual-mode beam; a photomixer unit which converts the first dual-mode beam focused by the forward lens unit into a terahertz wave, and outputs the converted terahertz wave; a backward lens unit which focuses the second dual-mode beam; and a light output unit which uses the second dual-mode beam focused by the backward lens unit as a light signal, wherein the bidirectional light source, the forward lens unit, the photomixer unit, the backward lens unit, and the light output unit are integrated in a housing. The terahertz wave generating module and the terahertz wave detecting device including the same according to the present invention may have a small size and efficiently monitor generated terahertz waves.
Abstract:
본 발명은 테라헤르츠파를 생성 및 검출하기 위한 포토믹서 모듈에 관한 것이다. 본 발명의 실시 예에 따른 포토믹서 모듈은, 입사되는 레이저광을 증폭시키는 반도체 광증폭기; 그리고 상기 증폭된 레이저광에 여기되어 연속 테라헤르츠파를 생성하는 포토믹서를 포함하되, 상기 반도체 광증폭기와 상기 포토믹서는 단일 모듈로 형성된다.
Abstract:
PURPOSE: A semiconductor laser device is provided to diversify the output characteristic itself of laser by controlling the refractive index or the reflectivity through the injection. CONSTITUTION: A gain area(101) provides the production of the lights of the plural wavelength and gain. A first reflective area(102) reflects the light of the first wave length in response to a first selection signal among the lights of the wave length to the gain area. A second reflective area(104) reflects the light of the second wave length in response to the second selective signal among the lights of the wave length to the gain area. A phase adjustment area(103) is located in the first reflective region and the second between reflective regions. The phase adjustment area transfers the optical phase of the second wavelength in response to the phase adjust signal.