Optical waveguides – Polarization without modulation
Patent
1996-06-21
1998-01-13
Ullah, Akm E.
Optical waveguides
Polarization without modulation
372 27, G02B 600
Patent
active
057087342
ABSTRACT:
A polarisation-independent optical device for influencing the phase of an optical signal includes, in a light conductor (11), two identical adjustable phase shifters (14, 15), between which there is placed a polarisation converter (16). Optical signal components (I) entering at the input (12) of the light conductor as TE and TM polarisation modes, leave the light conductor at an output (13) as TM and TE polarisation modes having the same phase differences with respect to the signal components at the input. By way of simultaneous control of the phase shifters (14, 15) having a same modulation voltage V, there is obtained a polarisation-independent phase modulator. By including such a phase modulator in a branch of an MZ interferometer and placing, in the other branch, an identical polarisation converter, there may be realised a polarisation-independent switch or an intensity modulator.
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Koninklijke PTT Nederland N.V.
Ullah Akm E.
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