The present invention also features an external cavity laser source that includes a free space external cavity comprising a laser array, an optical element, a dispersive element, and a partially reflecting element. The laser array comprises at least two optical gain elements where each of the at least...http://www.google.com.hk/patents/US6192062?utm_source=gb-gplus-share專利 US6192062 - Beam combining of diode laser array elements for high brightness and power
