Patent ID: 9685766
Date: 2017-06-20
CPC Classifications: B82Y,H01S

Claim:
1. A method of forming a laser source capable of producing mid-IR laser radiation, the method comprising: growing or depositing a first core structure on a substrate; etching away the first core structure in one or more locations on the substrate; and growing or depositing a second core structure in at least one of the one or more locations on the substrate, wherein at least one of the first and second core structures comprises a first quantum cascade gain medium structured for generating intersubband transitions emitting at a first center frequency within the range from 3-14 μm; wherein at least a second of the first and second core materials comprises one of: (a) a second quantum cascade gain medium structured for generating intersubband transitions emitting at a second center frequency within the range from 3-14 μm, said second center frequency being different from said first center frequency, (b) a semiconductor gain medium structured for generating interband transitions emitting at a second center frequency, said second center frequency being different from said first center frequency, and (c) a passive core made comprising one of AlInAs, InGaAs, GaInAsP, or AlGaInAs.