title: Effect of Yb doping on the refractive index and thermo-optic coefficient of YVO4single crystals.
abstract: Single crystals of YVO4with different doping concentrations of Yb (1.5, 3.0, 8.0, and 15.0 at. %) and with good crystalline quality (FWHM ∼43-55 arc sec of rocking curve) were grown by the optical floating zone technique. Refractive index measurements were carried out at four wavelengths as a function of temperature. The measurements show that as the doping concentration of Yb is increased, the refractive index varies marginally for newhereas there is a significant change in the value of no. The thermo-optic coefficient (dn/dT) was found to be positive with a value ∼10-5/°C, which is 1 order higher than that for the undoped YVO4crystal. The thermo-optic coefficient is higher for necompared to that of no. Also, a set of relations describing the wavelength dependence of the thermo-optic coefficient were established that are useful for calculating the thermo-optic coefficient at any temperature in the range 30°C-150°C and at any wavelength in the range 532-1551 nm.
authors.forename: M
authors.initials: M
authors.lastname: Soharab
authors.forename: Indranil
authors.initials: I
authors.lastname: Bhaumik
authors.forename: R
authors.initials: R
authors.lastname: Bhatt
authors.forename: A
authors.initials: A
authors.lastname: Saxena
authors.forename: A K
authors.initials: AK
authors.lastname: Karnal
authors.forename: P K
authors.initials: PK
authors.lastname: Gupta