Wavelength-selectable laser diode and optical communication apparatus including same
AssigneeElectronics and Telecommunications Research Institute
InventorsOh Kee Kwon, Su Hwan Oh, Kisoo Kim, Chul-Wook Lee
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Abstract
Disclosed are a wavelength-selectable laser diode and an optical communication apparatus including the same. The wavelength-selectable laser diode includes a substrate, which includes a gain region, a tuning region spaced apart from the gain region, and a phase adjusting region between the tuning region and the gain region, a waveguide layer on the substrate, a clad layer on the waveguide layer, and gratings disposed on the substrate or the clad layer in the gain region and the tuning region.
Claims16
A wavelength-selectable laser diode comprising:
- a substrate comprising a gain region, a tuning region separated from the gain region, and a phase adjusting region between the tuning region and the gain region;
- a waveguide layer on the substrate;
- a clad layer on the waveguide layer;
- and
- gratings disposed on the substrate or the clad layer in the gain region and the tuning region,
- wherein the gratings comprise:
- a first grating disposed in the gain region and having a first grating length;
- and
- a second grating disposed in the tuning region and having a second grating length different from the first grating length,
- wherein the first grating includes first group gratings having first sampling lengths,
- wherein each of the first group gratings includes first sub group gratings having first super structure grating lengths,
- wherein each of the first sub group gratings includes first unit gratings having first pitches,
- wherein the second grating includes second group gratings having second sampling lengths different from the first sampling lengths,
- wherein each of the second group gratings includes second sub group gratings having second super structure grating lengths different from the first super structure grating lengths, and
- wherein each of the second sub group gratings includes second unit gratings having second pitches different from the first pitches.
An optical communication apparatus comprising:
- a plurality of wavelength-selectable laser diodes;
- and
- an optical combiner connected to the plurality of wavelength-selectable laser diodes,
- wherein the each of the plurality of wavelength-selectable laser diodes comprises:
- a substrate comprising a gain region, a tuning region spaced apart from the gain region, and a phase adjusting region between the tuning region and the gain region;
- a waveguide layer on the substrate;
- a clad layer on the waveguide layer;
- and
- gratings disposed on the substrate or the clad layer in the gain region and the tuning region,
- wherein the gratings comprise:
- a first grating disposed in the gain region and having a first grating length;
- and
- a second grating disposed in the tuning region and having a second grating length different from the first grating length,
- wherein the first grating includes first group gratings having first sampling lengths,
- wherein each of the first group gratings includes first sub group gratings having first super structure grating lengths,
- wherein each of the first sub group gratings includes first unit gratings having first pitches,
- wherein the second grating includes second group gratings having second sampling lengths different from the first sampling lengths,
- wherein each of the second group gratings includes second sub group gratings having second super structure grating lengths different from the first super structure grating lengths, and
- wherein each of the second sub group gratings includes second unit gratings having second pitches different from the first pitches.
Dependencies are inferred from the claim text.