Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-11-23
1996-11-12
Boudreau, Leo
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359139, 359158, H04J 1408, H04B 1000
Patent
active
055745865
ABSTRACT:
A simultaneous optical compression and decompression apparatus having a simple symmetrical arrangement including a plurality of optical splitting/combining units capable of achieving simultaneous splitting and combining of optical signals in opposite directions, a plurality of optical delay units each arranged between adjacent ones of the optical splitting/combining units and adapted to delay the time taken for an optical signal to pass therethrough in each of opposite directions by a predetermined time, so as to reproduce the optical signal in accordance with a predetermined rule. The apparatus also includes a pair of optical isolation units respectively connected to opposite end-side ones of the optical splitting/combining units, each of the optical isolation units being adapted to allow an optical signal to pass therethrough in one direction; a pair of optical switching units respectively connected to opposite end-side ones of the optical splitting/combining units and adapted to switch optical signals output from the optical splitting/combining units in response to control signals, so as to allow predetermined optical signals to pass therethrough; and a pair of control units respectively connected to the optical switching units and adapted to apply the control signals to the optical switching units.
REFERENCES:
patent: 5121240 (1992-06-01), Acampora
patent: 5410671 (1995-04-01), Elgamal et al.
Chu Kwang Uk
Kim Byeong H.
Kim Ki H.
Shin Seo Y.
Won Yong h.
Boudreau Leo
Electronics and Telecommunications Research Institute
Korea Telecommunication Authority
Negash Kinfe-Michael
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