PURPOSE: To provide larger phase modulation to signal energy of a given quantity by transmitting electromagnet radiations into an etched optical fiber and elongating or compressing this optical fiber in a longitudinal direction.
CONSTITUTION: For example, a submersible acoustic sensor is immersed into a soln. contg. acoustic signals. The periodic changes of the pressure appearing in the acoustic signals expand or contract a soft thin film 7-9. The etched single mode optical fiber 8-9 is elongated or contracted in compliance with the expansion or contraction of this thin film 7-9. The electromagnetic radiations propagating the inside of the core of the fiber 8-9 are, therefore, modulated. The single mode fiber is elongated or contracted in the longitudinal direction by using the one signal energy in such a manner, by which the changes are induced in the optical distance of the optical fiber. As a result, the phase modulation of the larger quantity of the light propagating in the core is obtd.
| JPS61213808 | OPTICAL TRIGGER THYRISTOR |
| JP2006126404 | CABINET FOR HOUSING OPTICAL CABLE CONNECTING PART |
| WO/2001/025685 | LIGHT GUIDE LUMINAIRE |
UIRIAMU ETSUCHI KARUBAA
GOODON GOURUDO
| JPS4930461A | 1974-03-18 | |||
| JPS54159238A | 1979-12-15 |