3 W of single-frequency output at 532 nm by intracavity frequency doubling of a diode-bar-pumped Nd:YAG ring laser

Abstract

A beam-shaped 20-W diode bar has longitudinally pumped a Nd:YAG laser in a ring configuration. Unidirectional single-frequency operation is enforced by a Faraday rotator. Intracavity frequency doubling with a KTP crystal has produced 3 W of stable single-frequency TEM00 output at 532 nm.

Efficient and Compact Yb:YAG Ring Laser

“…Contrary to the four-level Nd:YAG as a gain medium [4], even up to a magnetic flux of 4400 Gauss, we cannot make the ring laser be unidirectional propagation. Since the Verdet constant, , depends on the dispersion, i.e., (3) where and are the electron charge and mass, respectively.…”

“…Unidirectional operation of the ring cavity was obtained by intracavity reciprocal and nonreciprocal polarization rotators [1]- [3]. The spatial hole-burning effect and green problem can be eliminated in these ring cavities.…”

“…The spatial hole-burning effect and green problem can be eliminated in these ring cavities. Ring cavity lasers were also generated by a polygonal cut crystal [2] or constructed by three to four optical elements [3], to form a closed loop, the complicated configuration consumes large space and makes the optical alignment difficult. Herriott-type multipass cell (HMPC) was used to improve this situation.…”

Broadband tunable single-frequency Nd:YVO4/LBO green laser with high output power

“…For example, for spectroscopy applications of molecular iodine with the transition of 532.245 nm and I 2 -stabilized laser systems, singlefrequency green radiation around 532 nm with high output power above several watts and a significant tuning range over 10 GHz are required. High-power single-frequency green lasers using the ring cavity geometry were reported by several groups [6][7][8].…”

High-stability single-frequency green laser with a wedge Nd:YVO4 as a polarizing beam splitter

“…To realize the stable single-frequency operation of solid lasers with ring cavity con- figuration, linear polarized lasing in a stationary polarization direction is prerequisite. On the basis of the principle of Brewster plate with full transmission of P-polarization and 85% of transmission of S-polarization, Martin et al obtained the linear polarized lasing by inserting a Brewster plate into the ring cavity [10]. Since the Nd:Y-VO 4 is a birefringent laser crystal and the optical gain in the polarization parallel to the c-axis (p-polarization)is four times of that in r-polarization perpendicular to the c-axis, lasing will naturally operate in p-polarization direction [11,12].…”