Integrated micro optical flying head with lens positioning actuator for small form factor data storage

2004 ◽  
Author(s):  
Seong-Hyok Kim ◽  
Youngjoo Yee ◽  
Junghoon Choi ◽  
Hyouk Kwon ◽  
Man-Hyo Ha ◽  
...  
Keyword(s):  
Form Factor ◽  
Data Storage ◽  
Small Form ◽  
Factor Data ◽  
Small Form Factor ◽  
Form Factor Data

MINIATURE FLUID DYNAMIC BEARING WITH IMPROVED LOAD CAPACITY

2015 ◽  
Vol 39 (3) ◽  
pp. 527-535 ◽  
Author(s):  
Chien-Sheng Liu ◽  
Min-Kai Lee ◽  
Ying-Chi Chuo
Keyword(s):  
Data Storage ◽  
Fluid Dynamic ◽  
Load Capacity ◽  
Spindle Motor ◽  
Fluid Dynamic Bearing ◽  
Factor Data ◽  
Small Form Factor ◽  
Form Factor Data ◽  
Novel Design ◽  
Herringbone Grooves

In this paper a novel design is proposed to improve the load capacity of fluid dynamic bearing (FDB) for miniature spindle motors and small-form-factor data storage applications. In contrast to conventional miniature FDB with two sets of herringbone grooves on its inner surface, the proposed miniature FDB comprises another one set of herringbone grooves on its outer surface. The proposed miniature FDB is verified numerically utilizing commercial software Advanced Rotating Machinery Dynamics (ARMD). The simulation results show that compared to the conventional miniature FDB, the proposed miniature FDB can obviously improve the load capacity of the bearing system. Overall, the results presented in this study show that the proposed miniature FDB provides another solution for miniature spindle motor applications.

Integrated MEMS optical flying head with lens positioning actuator for small form factor optical data storage

2004 ◽  
Vol 114 (2-3) ◽  
pp. 429-437 ◽  
Author(s):  
Seong-Hyok Kim ◽  
Youngjoo Yee ◽  
Junghoon Choi ◽  
Hyouk Kwon ◽  
Man-Hyo Ha ◽  
...  
Keyword(s):  
Form Factor ◽  
Data Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Small Form ◽  
Small Form Factor

scholarly journals Design and Implementation Scheme of QSFP28 Optical Transceiver for Long-Reach Transmission Using PAM4 Modulation

2021 ◽  
Vol 11 (6) ◽  
pp. 2803
Author(s):  
Jae-Woo Kim ◽  
Dong-Seong Kim ◽  
Seung-Hwan Kim ◽  
Sang-Moon Shin
Keyword(s):  
Form Factor ◽  
Low Cost ◽  
Pulse Amplitude ◽  
Small Form ◽  
Transceiver Design ◽  
Industrial Sites ◽  
Design And Implementation ◽  
Design Scheme ◽  
Implementation Scheme ◽  
Small Form Factor

A quad, small form-factor pluggable 28 Gbps optical transceiver design scheme is proposed. It is capable of transmitting 50 Gbps of data up to a distance of 40 km using modulation signals with a level-four pulse-amplitude. The proposed scheme is designed using a combination of electro-absorption-modulated lasers, transmitter optical sub-assembly, low-cost positive-intrinsic-native photodiodes, and receiver optical sub-assembly to achieve standard performance and low cost. Moreover, the hardware and firmware design schemes to implement the optical transceiver are presented. The results confirm the effectiveness of the proposed scheme and the performance of the manufactured optical transceiver, thereby confirming its applicability to real industrial sites.

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