MEMS Optical Devices – Introduction of MEMS Technologies

MEMS is a micro-electro-mechanical system fabricated with IC process. It is usually based on Si-wafer. The mechanical structures are fabricated with processes such as lithography, ion-beam etching, chemical etching and wafer bonding. Meanwhile, electrodes are fabricated along with the mechanical structures for electrical controlling.

MEMS in Life
The fist rotary MEMS motor was born in UC Berkley in 1988, as shown in Fig.1 [1]. Then in 1989, the first lateral comb drive emerged in Sandia National Laboratories, where the structures move laterally to the surface [2].

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Fiber Optic Connectors – Standards to Ensure Physical Contact

As we know, physical contact is most important to ensure low IL and high RL for fiber connection. The evolution of endface polishing types experiences physical contact (PC), ultra physical contact (UPC) and angled physical contact (APC), as shown in Fig.1. All the endfaces are spherically polished. The UPC connector has a smaller radius of curvature than the PC connector. For the APC connector, the sphere surface is usually tilted by an angle of 8°. The RL guaranteed by PC, UPC and APC is 40dB, 55dB and 65dB, respectively.

Fig.1 Polish types for the endfaces of fiber optic connectors
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Fiber Optic Connectors—Basics for Optical Fiber Connection

Fiber optic connectors are the most basic optical passive components for optical fiber communication systems. The basic specification requirements for them are low insertion loss (IL) and high return loss (RL), i.e. low back reflection (BR). However, as the most widely employed components, low cost and easy connection are equal important as the specifications.

Alignment of Optical Fibers
The core size of the single mode fiber (SMF) is about 8~10μm. The two connected fibers must be precisely aligned to ensure low loss. Fig.1 shows how much the lateral offset between two optical fibers influence the IL. The curve is exponential. A small lateral offset such as 2.4μm will introduce IL of 1dB. Thus the lateral offset between the two fibers must be kept <0.5μm for SMF fiber optic connectors.

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HYC Show Review of OFC 2019

Local time March 5 to 7, 2019, OFC opened in San Diego Convention and Exhibition Center, California, USA. OFC is recognized as an international event with the highest specifications, the largest scale, the longest history, the strongest professionalism and the greatest influence in the field of optical communication. HYC and its new products were on display and suddenly became a highlight on the show.

HYC team in OFC 2019
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HYC CO., Ltd

HYC Co.,Ltd(HYC)is a national Hi-tech optoelectronics company engaged in R&D, manufacture and marketing of fiber optical products. Providing professional product and service for fiber connectivity,WDM, PLC splitter and high density datacom cabling. HYC products and solutions widely applied in 4G/5G, Data Center and Cloud Computing industry etc.

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