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Er-diffused Ti:LiNbO3 waveguide laser of 1563 and 1576 nm emission wavelengths (1992)

Becker, P. ; Brinkmann, R. ; Dinand, M. ; [et al.]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 61 (1992), S. 1257-1259

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: The first continuous wave (cw) and pulsed mode operation of an Er-diffused Ti:LiNbO3 monomode waveguide laser at 1563 nm (E⊥ c) and 1576 nm (E(parallel) c) wavelengths is reported. A tunable Tl:KCl color center laser was used as a pump source. With π-polarized (Ep(parallel) c) pump radiation of 1479 nm wavelength an oscillation threshold of 13 mW coupled pump power was achieved for the 1576 nm emission line. Above 25 mW pump power additional lasing at 1563 nm wavelength was observed. σ-polarized (Ep⊥ c) pumping led to a single line emission at 1563 nm throughout with the highest cw output power of 3 mW and a slope efficiency of 3%. Time averaged emission linewidths of about 0.6 nm were measured for both wavelengths at about two times the threshold pump power level. With pulsed excitation of about 1 W coupled peak power output pulses of up to 200 mW peak power were measured.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.107610

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Erbium incorporation in LiNbO3 by diffusion-doping (1996)

Baumann, I. ; Brinkmann, R. ; Dinand, M. ; [et al.]

Springer

Applied physics 64 (1996), S. 33-44

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ISSN: 1432-0630

Keywords: PACS: 42.70; 66.30

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Notes: Abstract. The erbium incorporation into LiNbO3 by diffusion doping is investigated in detail by means of Secondary Ion Mass Spectrometry, Secondary Neutral Mass Spectrometry, Rutherford Backscattering, Atomic Force Microscopy, X-ray Standing Wave technique and optical site-selective spectroscopy. The diffusion of erbium in LiNbO3 can be described by Fick’s laws of diffusion with a concentration-independent diffusion coefficient. The diffusion constants and activation energies for Z-cut (X-cut) LiNbO3 are 4.8×10-5 cm2/s (12.0×10-5 cm2/s) and 2.28 eV (2.44 eV), respectively. A limited solubility of erbium in LiNbO3 has to be taken into account increasing exponentially with rising temperature. During the first step of diffusion an Er x Nb y -oxide layer is formed at the surface of the sample acting as diffusion reservoir. Erbium is incorporated into LiNbO3 on vacant Li-sites slightly shifted from the original Li-position along the (-c)-direction. Site-selective spectroscopy found four distinguishable energetically different erbium centres at this lattice site resulting from locally different symmetries of the crystal field.