Amplifying Optical Fibers

• Main Authors: Tandon, Pushkar, Bennett, Kevin Wallace
• Format: Patent
• Language: English
• Published: 19.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES USING STIMULATED EMISSION; ELECTRICITY

An amplifying optical fiber includes a common cladding comprising a radius defining a glass portion of the amplifying optical fiber and having a relative refractive index Δ4. At least one waveguide extends through the common cladding The at least one waveguide includes a core region, an inner cladding region encircling and directly contacting the core region, and a depressed cladding region encircling and directly contacting the inner cladding region. The core region includes from greater than or equal to about 500 ppm and less than or equal to about 10,000 ppm Er2O3 and has core maximum relative refractive index Δ1max. The inner cladding region includes an inner cladding relative refractive index Δ2. The depressed cladding region includes a minimum depressed relative refractive index Δ3min such that Δ1max>Δ2>Δ3min and Δ4>Δ3min.