Laser-diode-excited laser apparatus, fiber laser apparatus, and fiber laser amplifier in which laser medium doped with one of Ho3+, Sm3+, Eu3+, Dy3+, Er3+, and Tb3+ is excited with GaN-based compound laser diode

A laser-diode-excited solid-state laser apparatus comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• a solid-state laser crystal which is doped with Sm3+, and emits a solid-state laser beam generated by one of a first transition from 4G5/2 to 6H5/2, a second transition from 4G5/2 to 6H7/2, and a third transition from 4F3/2 to 6H11/2 when the solid-state laser crystal is excited with said excitation laser beam.

A laser-diode-excited solid-state laser apparatus comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• a solid-state laser crystal which is doped with Eu3+, and emits a solid-state laser beam generated by a transition from 5D0 to 7F2 when the solid-state laser crystal is excited with said excitation laser beam.

A laser-diode-excited solid-state laser apparatus comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• a solid-state laser crystal which is doped with Dy3+, and emits a solid-state laser beam generated by one of a first transition from 4F9/2 to 6H13/2 and a second transition from 4F9/2 to 6H11/2 when the solid-state laser crystal is excited with said excitation laser beam.

A laser-diode-excited solid-state laser apparatus comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• a solid-state laser crystal which is doped with Er3+, and emits a solid-state laser beam generated by one of a first transition from 4S3/2 to 4I15/2 and a second transition from 2H9/2 to 4I13/2 when the solid-state laser crystal is excited with said excitation laser beam.

A laser-diode-excited solid-state laser apparatus comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• a solid-state laser crystal which is doped with Tb3+, and emits a solid-state laser beam generated by a transition from 5D4 to 7F5 when the solid-state laser crystal is excited with said excitation laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Ho3+, and emits a second laser beam generated by one of a first transition from 5S2 to 5I7 and a second transition from 5S2 to 5I8 when the optical fiber is excited with said first laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Sm3+, and emits a second laser beam generated by one of a first transition from 4G5/2 to 6H5/2, a second transition from 4G5/2 to 6H7/2, and a third transition from 4F3/2 to 6H11/2 when the optical fiber is excited with said first laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Eu3+, and emits a second laser beam generated by a transition from 5D0 to 7F2 when the optical fiber is excited with said first laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Dy3+, and emits a second laser beam generated by one of a first transition from 4F9/2 to 6H13/2 and a second transition from 4F9/2 to 6H11/2 when the optical fiber is excited with said first laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Er3+, and emits a second laser beam generated by one of a first transition from 4S3/2 to 4I15/2 and a second transition from 2H9/2 to 4I13/2 when the optical fiber is excited with said first laser beam.

A fiber laser apparatus comprising:

• a GaN-based compound laser diode which emits a first laser beam;
• and
• an optical fiber which has a core doped with Tb3+, and emits a second laser beam generated by a transition from 5D4 to 7F5 when the optical fiber is excited with said first laser beam.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Ho3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by one of a first transition from 5S2 to 5I7 and a second transition from 5S2 to 5I8 when the optical fiber is excited with said excitation laser beam.

A fiber laser amplifier according to claim 85, wherein said fluorescence is generated by said first transition from 5S2 to 5I7 and is in a wavelength range of 740 to 760 nm.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Sm3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by one of a first transition from 4G5/2 to 6H5/2, a second transition from 4G5/2 to 6H7/2, and a third transition from 4F3/2 to 6H11/2 when the optical fiber is excited with said excitation laser beam.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Eu3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by a transition from 5D0 to 7F2 when the optical fiber is excited with said excitation laser beam.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Dy3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by one of a first transition from 4F9/2 to 6H13/2 and a second transition from 4F9/2 to 6H11/2 when the optical fiber is excited with said excitation laser beam.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Er3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by one of a first transition from 4S3/2 to 4I15/2 and a second transition from 2H9/2 to 4I13/2 when the optical fiber is excited with said excitation laser beam.

A fiber laser amplifier comprising:

• a GaN-based compound laser diode which emits an excitation laser beam;
• and
• an optical fiber which has a core doped with Tb3+, and amplifies incident light which has a wavelength within a wavelength range of fluorescence generated by a transition from 5D4 to 7F5 when the optical fiber is excited with said excitation laser beam.