Optically pumped, single-frequency, Nd-doped, solid-state lasers have been constructed using flat–flat cavities, which were diced from large dielectrically coated wafers of various crystals. For example, a Nd:YAG laser with a cavity length of 730 μm has operated at room temperature in a single longitudinal mode from a threshold of less than 1 mW to greater than 40 times the threshold. The slope efficiency was greater than 30%. Heterodyne measurements showed an instrument-limited linewidth of 5 kHz. The microchip lasers demonstrate ways to reduce greatly the cost and complexity of fabricating small lasers and electro-optic devices.
© 1989 Optical Society of America
Original Manuscript: July 14, 1988
Manuscript Accepted: September 28, 1988
Published: January 1, 1989
J. J. Zayhowski and A. Mooradian, "Single-frequency microchip Nd lasers," Opt. Lett. 14, 24-26 (1989)