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. 2014 Nov 4;4:6889. doi: 10.1038/srep06889

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(A) The principle of the Ba(NO₃)₂ crystal-based Raman Shifter. (B) The Schematics of the Raman shifter: M₁-M₇: 45° 1064 nm reflective mirror; PBS: polarizing beam splitter; HWP: half wave plate; M₈: resonator end mirror; M₉: output coupler; M₁₀: silver mirror. (C) The schematics of the MOPA system: Amp: amplifier; PH: pin hole; QR: quartz rotator; OI: optical isolator; FA: fiber amplifier; DL: Directly modulated diode laser.