Er, Yb:phosphate glass «In Stock»
Er3+, Yb3+ co-doped phosphate glass (Er, Yb:phosphate glass) is a well-known and commonly used active medium for lasers emitting in the “eye-safe” spectral range of 1,5-1,6 µm. Phosphate glass combines a long lifetime (~8 ms) of 4I13/2 Er3+ upper laser level with a low (2–3 ms) lifetime of 4I11/2Er3+ level that is in resonance with Yb3+ 2F5/2 excited state. Fast non-radiative multi-phonon relaxation from 4I11/2 to 4I13/2 level greatly decreases the back-energy transfer and up-conversion losses due to the interaction between Yb3+ and Er3+ ions, excited at the 2F5/2 and the 4I11/2 levels, respectively.
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6x1 mm; 10 mm; Yb 20% Er 0,5%; Right-angle cut; +0,0/-0,1 mm; ±0,1 mm; >80%; 20-10 S-D; <λ/10@632,8 nm; <10 arcsec; <10 arcmin; <0,1 mm at 45˚; AR(R<0.25%) @ 1530-1540 nm, AOI=0 deg. S3/S4: AR(R<0.25%) @ 930-950 nm, AOI=0 deg.; AR/AR@940 nm + 1535 nm
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