Silica-based Yb3 -doped glass is prepared by non-chemical vapor deposition. The drawn photonic crystal fiber (PCF) has a strong absorption at 976 nm and emission wavelength of approximately 1 037 nm. The intensity and spectral lineshape of the near infrared (NIR) luminescence of the Yb3 -doped PCF are recorded and discussed in terms of excitation power, excitation wavelength, fiber length, and Yb3 ion concentration. The emission intensifies as the excitation power and Yb3 ion concentration increase. The intensity of the shorter wavelength side of the luminescence spectrum decreases as the length of the PCF increases.