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US 2014/0192827 A1Published application
Resonator, variable wavelength optical filter, and variable wavelength laser diode
AssigneeElectronics and Telecommunications Research Institute
InventorKwang Ryong OH
Life of this patent
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Abstract
A variable wavelength diode according to the inventive concept includes a resonator and a plurality of cylindrical lenses. The resonator includes slab waveguides of which resonance lengths are different from each other. The slab waveguides are disposed on a planar light wave circuit (PLC). Thus, the variable wavelength diode realizes a high variation speed and a continuous variation of a beam at the same time.
Claims20
A resonator comprising:
- a first slab waveguide;
- a second slab waveguide spaced apart from the first slab waveguide;
- and
- a substrate to which the first and second slab waveguides are connected,
- wherein a resonance length of the first slab waveguide is different from a resonance length of the second slab waveguide;
- and
- wherein the first slab waveguide is electrically and optically independent of the second slab waveguide.
4 more elements
A variable wavelength optical filter comprising:
- a first cylindrical lens receiving a beam, the first cylindrical lens having a central axis perpendicular to an incidence direction of the beam;
- a second cylindrical lens having a central axis perpendicular to the central axis of the first cylindrical lens, the second cylindrical lens receiving a beam outputted from the first cylindrical lens;
- a resonator resonating a beam outputted from the second cylindrical lens and outputting the resonated beam;
- a third cylindrical lens receiving the beam outputted from the resonator, the third cylindrical lens having a central axis parallel to the central axis of the second cylindrical lens;
- and
- a fourth cylindrical lens having a central axis perpendicular to the central axis of the third cylindrical lens, the fourth cylindrical lens receiving a beam outputted from the third cylindrical lens.
3 more elements
A variable wavelength laser diode comprising:
- a super-luminescence diode (SLD) receiving and outputting a beam;
- a first cylindrical lens having a central axis perpendicular to an incidence direction of the beam outputted from the super-luminescence diode, the first cylindrical lens receiving the beam from the super-luminescence diode;
- a second cylindrical lens having a central axis perpendicular to the central axis of the first cylindrical lens, the second cylindrical lens receiving a beam outputted from the first cylindrical lens;
- a third cylindrical lens having a central axis parallel to the central axis of the second cylindrical lens, the third cylindrical lens reflecting an input beam by a high-reflective (HR) thin film, and the high-reflective thin film coated on a portion of the third cylindrical lens;
- and
- a resonator disposed between the second cylindrical lens and the third cylindrical lens, the resonator outputting a beam from the second cylindrical lens to the third cylindrical lens, and the resonator outputting the beam reflected from the third cylindrical lens into the second cylindrical lens,
- wherein the first cylindrical lens outputs a beam outputted from the second cylindrical lens into the super-luminescence diode.
4 more elements
Dependencies are inferred from the claim text.