Optical device comprising a mode adapter on an optical component with photonic band gap

• US 20050041924A1
• Filed: 03/04/2003
• Published: 02/24/2005
• Est. Priority Date: 03/05/2002
• Status: Abandoned Application

• Current Assignee: Alcatel SA (Nokia Corporation)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Ksas, Sarah, Bouadma, Noureddine
• Application Number:
  US10/415,292
• Publication Number:
  US 20050041924A1
• Time in Patent Office: Days
• US Class Current: 385/43
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 6/1225 comprising photonic band-gap structures or photonic lattices
• CPC Class Codes: G02B 6/1228 Tapered waveguides, e.g. integrated spot-size transformers for coupling with fibres G02B6/305
• CPC Class Codes: G02B 6/305 and having an integrated mode-size expanding section, e.g. tapered waveguide

Abstract

An optical device comprising a Photonic Forbidden Band (PFB) component composed of a thick material including a distribution of regularly spaced holes, the said photonic forbidden band component being delimited by first and second ends and comprising a wave guide of the total internal reflection (TIR) type, characterised in that the photonic forbidden band component comprises a mode adapter integrated on the first and/or second end of the said photonic component, the mode adapter also consists of a distribution of holes in the photonic forbidden band (PFB) component causing an adiabatic widening of the total internal reflection (TIR) waveguide on the said first and/or second end of the component.

Claims

1. An optical device comprising a Photonic Forbidden Band (PFB) component composed of a thick material including a distribution of regularly spaced holes, the said photonic forbidden band component being delimited by first and second ends and comprising a waveguide of the Total Internal Reflection (TIR) type, characterised in that the photonic forbidden band component comprises a mode adapter integrated on the first and/or second end of the said photonic component, the said adapter consisting of a reduction in the diameter of the holes from the said end in the direction of the waveguide (TIR).

2. An optical device according to claim 1, characterised in that the mode adapter is also formed by a distribution of the holes of the photonic forbidden band (PFB) component giving rise to an adiabatic widening of the total internal reflection (TIR) waveguide on the said first and/or second end of the component.

3. An optical device according to claim 1, characterised in that the distribution of the holes in the photonic forbidden band component is a matrix of lines.

4. An optical device according to claim 1, characterised in that the pitch of the distribution of the holes in the photonic forbidden band component is constant.

5. An optical system comprising an optical component comprising an index-jump optical waveguide coupled with a photonic forbidden band optical component comprising a waveguide of the total internal reflection (TIR) type, characterised in that the coupling between the said waveguides is provided by an optical device comprising a Photonic Forbidden Band (PFB) component composed of a thick material including a distribution of regularly spaced holes, the said photonic forbidden band component being delimited by first and second ends and comprising a waveguide of the Total Internal Reflection (TIR) type, the photonic forbidden band (PFB) component also comprising a mode adapter integrated on the first and/or second end of the said photonic component, the said adapter consisting of a reduction in the diameter of the holes from the said end in the direction of the waveguide (TIR).

6. A system according to claim 5, characterised in that the mode adapter is also formed by a distribution of holes in the photonic forbidden band (PFB) component giving rise to an adiabatic widening of the total internal reflection (TIR) waveguide on the said first and/or second end of the component.