Optical component constituting fiber amplifier, fiber amplifier, and manufacturing method

A fiber amplifier, comprising:

• a first optical component;
• a gain fiber;
• and
• one or more second optical components, wherein
• the gain fiber is configured to amplify an optical signal,
• the first optical component is configured for connection to the gain fiber by using a first fiber, or the first optical component is configured to directly connect to the gain fiber,
• the first optical component is configured for connection to the one or more second optical components by using a second fiber, and/or the first optical component is configured to input an optical signal or output an optical signal amplified by the gain fiber by using the second fiber,
• softening temperatures and/or refractive indexes of the first fiber and the second fiber are different, or the softening temperatures and the refractive indexes of the second fiber and the gain fiber are different,
• the first optical component is applied in a fiber amplifier,
• an absolute value of a difference between the softening temperatures of the first fiber and the second fiber is greater than an absolute value of a difference between the softening temperatures of the first fiber and the gain fiber, and
• an absolute value of the difference between the refractive indexes of the first fiber and the second fiber is greater than an absolute value of a difference between the refractive indexes of the first fiber and the gain fiber.

A method for manufacturing a first optical component, the method comprising:

• connecting to a gain fiber by using a first fiber, or directly connecting to the gain fiber, wherein the gain fiber is configured to amplify an optical signal;
• and
• connecting to one or more second optical components by using a second fiber, and/or inputting an optical signal or outputting the optical signal amplified by the gain fiber by using the second fiber, wherein
• softening temperatures and/or refractive indexes of the first fiber and the second fiber are different, or the softening temperatures and the refractive indexes of the second fiber and the gain fiber are different;
• the first optical component is applied in a fiber amplifier,
• an absolute value of a difference between the softening temperatures of the first fiber and the second fiber is greater than an absolute value of a difference between the softening temperatures of the first fiber and the gain fiber, and
• an absolute value of the difference between the refractive indexes of the first fiber and the second fiber is greater than an absolute value of a difference between the refractive indexes of the first fiber and the gain fiber.

A method for manufacturing a fiber amplifier, comprising a first optical component, a gain fiber, and one or more second optical components, the gain fiber is configured to amplify an optical signal, and the method comprising:

• connecting the first optical component to the gain fiber by using a first fiber, or directly connecting the first optical component to the gain fiber;
• and
• connecting the first optical component to the one or more second optical components by using a second fiber, and/or inputting an optical signal or outputting the optical signal amplified by the gain fiber by using the second fiber, wherein
• softening temperatures and/es refractive indexes of the first fiber and the second fiber are different, or the softening temperatures and/or the refractive indexes of the second fiber and the gain fiber are different, and
• the first optical component is applied in a fiber amplifier
• an absolute value of a difference between the softening temperatures of the first fiber and the second fiber is greater than an absolute value of a difference between the softening temperatures of the first fiber and the main fiber, and
• an absolute value of the difference between the refractive indexes of the first fiber and the second fiber is greater than an absolute value of a difference between the refractive indexes of the first fiber and the gain fiber.