Patent ID: 8248687
Filing Date: 2012-08-21
Classification: G02F,H01S

Abstract:
1. A wide-band optical amplifier comprising: a first amplifier that emits, based on a to-be-amplified light beam having a predetermined range of wavelengths and a first pump beam having a first wavelength, the to-be-amplified light beam having a first range of amplified wavelengths, the first range being a part of the predetermined range; and a second amplifier that emits, based on the to-be-amplified light beam having the first range of amplified wavelengths and a second pump beam having a second wavelength different from the first wavelength, the to-be-amplified light beam having a second range of amplified wavelengths, the second range being different from the first range; wherein the first amplifier is a first nonlinear crystal, and an angle formed between an optical axis of the first nonlinear crystal and the first pump beam is adjusted and an angle formed in the first nonlinear crystal between the to-be-amplified light beam and the first pump beam is adjusted, the second amplifier is a second nonlinear crystal, and an angle formed between an optical axis of the second nonlinear crystal and the second pump beam is adjusted and an angle formed in the second nonlinear crystal between the to-be-amplified light beam and the second pump beam is adjusted the to-be-amplified light beam and the first pump beam enter the first nonlinear crystal non-coaxially at an angle relative to each other, and the to-be-amplified light beam and the second pump beam enter the second nonlinear crystal non-coaxially at an angle relative to each other.