Homogenous silica-titania glass

A glass comprising:

• titania and silica,
• wherein:
• an average hydroxyl concentration of a plurality segments of the glass is about 600 ppm or greater,
• an average titania concentration of the plurality of segments is in a range from about 6 wt. % to about 12 wt. %,
• a peak-to-valley difference between a maximum refractive index and a minimum refractive index of the plurality of segments is about 1×10−4 or less,
• each segment of the plurality of segments has a length of about 12.7 mm, a width of about 12.7 mm, and a height of about 7.62 mm,
• the hydroxyl concentration of each segment is measured using a Fourier transform infrared spectroscopy in transmission,
• the refractive index is measured using an optical interferometer with a 633 nm operating wavelength and a resolution of 270 microns×270 microns pixel size, and
• the average titania concentration is determined based upon the measured refractive index.