Papers by Keyword: Optical Alignment

Abstract: Beam splitter is widely applied in many optical systems. The beam splitter is generally composed of many reflective mirrors and beam splitting prisms. The optical components can not reach the theoretical design state during assemble process. It must be solved through optical alignment. The mathematics model of alignment and error analysis for beam splitter are built in this paper. The effect of optical alignment error of beam splitter on optical system could be analyzed with this mathematical model. At the mean time, the mechanical alignment of beam splitter is directed to fast alignment in practical process. One kind of optical communication system is shown as example. The optical transmitting exit is commonly used. The requirement of axis parallelism of sub-systems is very strict. The axis parallelism between sub-systems reaches 5’’ in experiment with this model application.

Abstract: In the space laser communications, Information transmission by atmospheric turbulence and background light and other atmospheric interference of the random channel. Resulting in the optical axis alignment accuracy decreased. In order to improve the alignment accuracy of the optical axis, Proposing the Gaussian fitting matching algorithm. Outdoor experiments confirmed the Gaussian fitting matching algorithm to ensure a stable spot image.

Abstract: A packaging architecture is developed for MEMS tunable laser (MEMS-TL). The hybrid integration of chips is realized under high accuracy thermal control and precise alignment. The thermal conductivity of the laser chip has been improved up to 60% by the proper substrate design of device and epi-down bonding method. Under the analysis of heat flux, we employ a thermo-electric cooler (TEC) to stabilize the temperature. The substrate is designed to accommodate gain chips with minimal active optical alignment, thus reducing the packaging cost. With this packaging scheme, the insertion loss is greatly induced less than 1 dB due to the advantages of horizontal and vertical alignment in optical fiber fastening and laser diode bonding.