Publications

Metastable energy transfer emission spectroscopy, a highly sensitive, convenient, and low cost technique, has been applied for online monitoring of nitrogen purity.

Deep fading and multicell interference are the two main limiting factors for the practical realization of ultrareliable wireless transmissions.

We demonstrate improved efficiency and dynamic range for two-photon absorption at 1.5 mum. in a photoelectron-counting GaAs photomultiplier tube.

We report on a picosecond pulse source delivering near transform-limited pulses in the 1.55 mu m wavelength region, based on an optically pumped InP-based mode locked Vertical External Cavity Surfa

Theory of the self-starting passive mode-locked Yb3+-doped fiber ring laser generating short pulses is presented.

We report the production of 60 fs FWHM pulses directly from the soliton laser and 19 fs pulses with compression in an external fiber.

The various types of valve oscillators for obtaining ultrahigh frequencies are briefly outlined, and the limitations of negative grid oscillators enumerated and discussed.

We report on low frequency ultrasound studies of UBe13 and (Th,U) BE13. At low frequencies (10-100 MHZ) and at low acoustic powers we have observed a new resonance peak well below Tc.

Sound velocity, attenuation and thermal expansion measurements are reported on La sub (1.85) Sr sub (.15) Cu O sub 4.

We report measurements of the sound velocity in a wide variety of the high T sub c superconductors. They all show a pronounced hardening of the sound velocity below T sub c.