Share Email Print

Proceedings Paper

Small-size two-axis mechanical devices for FPM and PAM using piezoelectronic actuators
Author(s): Mamoru Furuya; Tomohiro Araki; Shiro Yamakawa; Yasumasa Hisada; Fumika Kondo; Toshikatsu Akiba
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We have developed two kinds of small size and light weight mechanical devices which consist of 2-axis piezoelectronic driving actuators and elastic hinges for fine pointing mechanism (FPM) and point ahead mechanism (PAM) optical inter- orbit communication (optical IOC) equipment. These are 'Beam Trapping Mechanism (BTM)' and 'Beam Scanning Mechanism (BSM)' respectively. High sensitivity receive system using single- mode optical fiber should be needed to increase communication data rate, which are a receiver of heterodyne detection in optical fiber and a receiver using optical pre-amplifier (for example, Er doped fiber amplifier). Therefore, both improvement of precision of FPM and control of the end of optical fiber are needed. In order to realize these requirements, we have designed, developed and tested two kinds of mechanical devices. At first, results of BTM, which consists of an optical fiber, four piezoelectric actuators, elastic hinges and a housing which mounts them, are described. The end facet of optical fiber supported by elastic hinges is controlled by piezoelectronic actuators in order to trap spatial received beam into optical fiber with high efficiency and high speed. The functional test results of BTM show a moving range of 140 (mu) rad, a resolution of less than 0.2 (mu) rad and natural frequency of 390 Hz. These values show BTM has enough performance for low-loss received beam trapping into optical fiber core. Furthermore, small-sized and lightweight BTM was realized using piezoelectronic actuators. We designed a BSM which has function of piezoelectronic driving 2-axis FPM in order to improve FPM. BSM have mirror of which size is 15 * 12 mm2. The mechanical concept of BSM is as same as BTM. In BSM, mirror is supported by elastic hinges, replace with optical fiber. Function test results show scanning angle range of more than 2.8 mrad at azimuth direction, 2.0 mrad at elevation direction, scanning resolution of 1.0 (mu) rad and natural frequency is 1.1 kHz. Furthermore, BSM is smaller and lighter compared with electro- magnetic devices.

Paper Details

Date Published: 27 May 1998
PDF: 9 pages
Proc. SPIE 3266, Free-Space Laser Communication Technologies X, (27 May 1998);
Show Author Affiliations
Mamoru Furuya, National Space Development Agency of Japan (Japan)
Tomohiro Araki, National Space Development Agency of Japan (Japan)
Shiro Yamakawa, National Space Development Agency of Japan (Japan)
Yasumasa Hisada, National Space Development Agency (Japan)
Fumika Kondo, Toshiba Corp. (Japan)
Toshikatsu Akiba, Toshiba Corp. (Japan)

Published in SPIE Proceedings Vol. 3266:
Free-Space Laser Communication Technologies X
G. Stephen Mecherle, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?