Device for dispersion compensation using tapered single-mode optical fiber

A device for compensating for dispersion, comprising:

• a) a first spatial-mode converter;
• b) a single-mode optical fiber connected to the first spatial-mode converter, where the single-mode optical fiber consists of a core, and a cladding, where the single-mode optical fiber has a first section of a user-definable length having a core-block induced therein;
• a second section of a user-definable length that immediately follows the first section, where the second section is tapered at a user-definable rate to a user-definable diameter;
• a third section of a user-definable length and a user-definable cutoff wavelength that immediately follows the second section, where the third section is a diameter equal to which the second section was tapered;
• a fourth section of a length equal to the length of the second section, where the fourth section immediately follows the third section, and where the fourth section is tapered at the same, but opposite, rate of the second section to a diameter equal to the diameter of the first section;
• a fifth section of a length equal to the length of the first section, where the fifth section immediately follows the fourth section;
• and where the single-mode fiber has a user-definable cutoff wavelength;
• and
• c) a second spatial-mode converter connected to the fifth section of the single-mode optical fiber.

A device for compensating for dispersion, comprising:

• a) a polarizer;
• b) a polarization rotator connected to the polarizer;
• and
• c) a single-mode optical fiber connected to the polarization rotator, where the single-mode optical fiber consists of a core, and a cladding, where the single-mode optical fiber has a first section of a user-definable length;
• a second section of a user-definable length that immediately follows the first section, where the second section is tapered at a user-definable rate to a user-definable diameter;
• a third section of a user-definable length and a user-definable cutoff wavelength that immediately follows the second section, where the third section is a diameter equal to which the second section was tapered;
• a fourth section of a length equal to the length of the second section, where the fourth section immediately follows the third section, and where the fourth section is tapered at the same, but opposite, rate of the second section to a diameter equal to the diameter of the first section;
• a fifth section of a length equal to the length of the first section, where the fifth section immediately follows the fourth section;
• and where the single-mode fiber has a user-definable cutoff wavelength.

A device for compensating for dispersion, comprising:

• a) a polarizer;
• b) a polarization rotator connected to the polarizer;
• c) a first spatial-mode converter connected to the polarization rotator;
• d) a single-mode optical fiber connected to the first spatial-mode converter, where the single-mode optical fiber consists of a core, and a cladding, where the single-mode optical fiber has a first section of a user-definable length;
• a second section of a user-definable length that immediately follows the first section, where the second section is tapered at a user-definable rate to a user-definable diameter;
• a third section of a user-definable length and a user-definable cutoff wavelength that immediately follows the second section, where the third section is a diameter equal to which the second section was tapered;
• a fourth section of a length equal to the length of the second section, where the fourth section immediately follows the third section, and where the fourth section is tapered at the same, but opposite, rate of the second section to a diameter equal to the diameter of the first section;
• a fifth section of a length equal to the length of the first section, where the fifth section immediately follows the fourth section;
• and where the single-mode fiber has a user-definable cutoff wavelength;
• and
• e) a second spatial-mode converter connected to the fifth section of the single-mode optical fiber.

A device for compensating for dispersion, comprising:

• a) a polarizer;
• b) a polarization rotator connected to the polarizer;
• c) a first spatial-mode converter connected to the polarization rotator;
• d) a single-mode optical fiber connected to the first spatial-mode converter, where the single-mode optical fiber consists of a core, and a cladding, where the single-mode optical fiber has a first section of a user-definable length having a core-block induced therein;
• a second section of a user-definable length that immediately follows the first section, where the second section is tapered at a user-definable rate to a user-definable diameter;
• a third section of a user-definable length and user-definable cutoff wavelength that immediately follows the second section, where the third section is a diameter equal to which the second section was tapered;
• a fourth section of a length equal to the length of the second section, where the fourth section immediately follows the third section, and where the fourth section is tapered at the same, but opposite, rate of the second section to a diameter equal to the diameter of the first section;
• a fifth section of a length equal to the length of the first section, where the fifth section immediately follows the fourth section;
• and where the single-mode fiber has a user-definable cutoff wavelength;
• and
• e) a second spatial-mode converter connected to the fifth section of the single-mode optical fiber.