Abstract
A key benefit of photonic crystal surface emitting lasers (PCSELs) is the ability to increase output power through scaling the emission area while maintaining high quality single mode emission, allowing them to close the brightness gap which exists between semiconductor lasers and gas and fiber lasers. However, there are practical limits to the size, and hence power, of an individual PCSEL device, and there are trade-offs between single-mode stability and parasitic in-plane losses with increasing device size. In this paper, we discuss 2D coherent arrays as an approach to area and coherent power scaling of PCSELs. We demonstrate in two and three element PCSEL arrays an increase in the differential efficiency of the system due to a reduction in in-plane loss.
Highlights
Photonic crystal surface emitting lasers (PCSELs) are a new class of laser diodes which incorporate a 2D photonic crystal (PC) layer into a semiconductor laser structure
For a PCSEL, the group velocity of light becomes zero at the band-edge which results in the formation of large and stable twodimensional single-cavity modes
We describe coherent PCSEL array power scaling (See Fig. 1) where higher differential efficiencies are demonstrated as the array number scitation.org/journal/adv increases due to reduced α∥
Summary
Photonic crystal surface emitting lasers (PCSELs) are a new class of laser diodes which incorporate a 2D photonic crystal (PC) layer into a semiconductor laser structure. We describe coherent PCSEL array power scaling (See Fig. 1) where higher differential efficiencies are demonstrated as the array number scitation.org/journal/adv increases due to reduced α∥.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
