Patent ID: 6947466

Claim:
A multilayer semiconductor laser, comprising: a substrate; a multilayer semiconductor heterostructure formed on the substrate; said heterostructure being divided into a plurality of electrically pumped regions and an elongated optically pumped region; said optically pumped region being optically pumped by radiation having a first wavelength generated and deposited laterally into the optically pumped region by said electrically pumped regions; wherein said optically pumped region is configured to generate radiation having a second wavelength longer than said first wavelength in response to said optical pumping and said second wavelength radiation is delivered as output radiation from one end of said optically pumped region; and wherein each of said electrically pumped regions has, at an end thereof furthest from said optically pumped region, a multilayer mirror having a high reflectivity at said first wavelength and a low reflectivity at said second wavelength.