Fig. 4: Co-integrated μFP to enable electrical control.
From: Harnessing micro-Fabry–Pérot reference cavities in photonic integrated circuits
a, Schematic of the approach for co-integrating the μFP cavity with signal redirection and back-reflection isolation. b, Cross-section of the co-integrated μFP cavity (i) and optical picture of a co-integrated module (ii). c, Experimental data validating signal redirection and characterizing back-reflection isolation ratio. d, Outlook for the on-chip PDH locking system. PM, phase modulator; LD, laser diode; EIC, electric integrated circuit.
