US 12,218,480 B2 · Semiconductor optical amplifier integrated laser

Abstract

A semiconductor optical amplifier integrated laser includes a semiconductor laser oscillator portion that oscillates laser light having a wavelength included in a gain band and a semiconductor optical amplifier portion that amplifies laser light output from the semiconductor laser oscillator portion. The semiconductor laser oscillator portion and the semiconductor optical amplifier portion have one common p-i-n structure, the common p-i-n structure includes an active layer, a cladding layer provided apart from the active layer, and a common functional layer formed in the cladding layer, and the common functional layer includes a first portion that reflects light having a wavelength within the gain band in the semiconductor laser oscillator portion and a second portion that transmits light having a wavelength within the gain band in the semiconductor optical amplifier portion.

Claims20

Dependent claims

A semiconductor optical amplifier integrated laser comprising:

a substrate;
a cladding layer formed above the substrate;
an active layer formed between the substrate and the cladding layer;
and
a common functional layer formed in the cladding layer and separated from the active layer,
wherein the semiconductor optical amplifier integrated laser includes a first domain and a second domain optically connected to the first domain,
wherein the second domain amplifies light from the first domain,
wherein the common functional layer includes a first portion that reflects light having a specific wavelength within a gain band of the active layer in the first domain and a second portion that transmits light having the specific wavelength within the gain band of the active layer in the second domain,
wherein the first domain includes a first grating structure, and
wherein the second domain includes a second grating structure at irregular intervals.

7 more elements

Dependencies are inferred from the claim text.

Semiconductor optical amplifier integrated laser

Life of this patent

Semiconductor optical amplifier integrated laser

Life of this patent

Abstract

Claims20