US 2019/0170939 A1 · OPTICAL MODULE AND INPUTTING METHOD

Abstract

An optical module includes: an output section that outputs TM light; and a substrate-type optical waveguide. The substrate-type optical waveguide includes: a waveguide that guides the TM light outputted from the output section; a polarization rotating element that converts the TM light guided through the waveguide into TE light; and a function element that receives the TE light. In the optical module equation (a×L)>(b×L+c) is satisfies, where L is a length of the waveguide, a is a propagation loss of the TE light per unit length of the waveguide, b is a propagation loss of the TM light per unit length of the waveguide, and c is an insertion loss by the polarization rotating element.

Claims8

Dependent claims

An optical module comprising:

an output section that outputs TM light;
and
a substrate-type optical waveguide comprising:
a waveguide that guides the TM light outputted from the output section;
a polarization rotating element that converts the TM light guided through the waveguide into TE light;
and
a function element that receives the TE light,
wherein formula (1) below is satisfied:
(a×L)>(b×L+c), where (1)
L is a length of the waveguide,
a is a propagation loss of the TE light per unit length of the waveguide,
b is a propagation loss of the TM light per unit length of the waveguide, and
c is an insertion loss by the polarization rotating element.

10 more elements

Dependencies are inferred from the claim text.

Optical module and inputting method

Life of this patent

Optical module and inputting method

Life of this patent

Abstract

Claims8