Abstract

The coupled-stripe diode laser array offers improved power and reduced beam divergence over conventional devices.^1,2 However, operation of these arrays in a single longitudinal mode with simultaneous control of the far-field emission pattern has proved difficult. In addition to longitudinal modes, coupling of the multiple-emitting stripes in these devices produces transverse supermodes, each exhibiting different far-field behavior. One approach to this problem has been to control the supermode oscillation and thereby determine the far field. Previous researchers have demonstrated the use of an external grating cavity to obtain far-field tuning.³ Recently, injection locking has emerged as a promising technique for simultaneous spectral and far-field control.⁴

© 1986 Optical Society of America