1：Experimental Design and Method Selection:

The study utilized two integrated single facet slotted Fabry–Pérot lasers to examine the different operational regimes arising from optically locking a semiconductor diode laser. The technique employed an optical spectrum analyser (OSA), an electrical spectrum analyser (ESA), and a high speed oscilloscope (HSO).

2：Sample Selection and Data Sources:

The samples used were two identical (within fabrication tolerances) SF-SFP lasers coupled together through a 615 μm long waveguide interconnect.

3：List of Experimental Equipment and Materials:

Optical spectrum analyser (Yokogawa AQ6370D), electrical spectrum analyser (HP 8565EC), high speed oscilloscope (Tektronix TDS6154C), photodetectors (Finisar XPRV2022 and Finisar XPDV2120), and an erbium doped ?bre ampli?er (EDFA).

4：Experimental Procedures and Operational Workflow:

The output of each SFP was ?bre coupled using a lensed ?bre. The output of the M-SFP was guided through single mode ?bre and a polarisation controller to port 1 of an optical circulator. The signal from port 3 of the circulator was split in three and fed to an OSA, an ESA, and a HSO.

5：Data Analysis Methods:

The wavelengths of the lasers were measured on the OSA and the selected optical mode for locking was identi?ed. The region of injection locking and various other regions of dynamical behaviour between the lasers were observed on the ESA. The time trace information of the system was obtained from the HSO and performing the FFT of the time traces returned the power spectra.