An electronically tunable monolithic flared amplifier master oscillato
r power amplifier structure is described. This device is composed of a
DBR laser tunable by free-carrier injection integrated with a flared
amplifier, and generates 1-W CW of near-diffraction-limited, single mo
de power at lambda approximately 980 nm, while allowing wavelength tun
ing over a 6-angstrom range using a tuning current of 30 mA. This devi
ce is useful in applications requiring high power, high beam quality,
and precise wavelength control simultaneously such as in frequency dou
bling.