This dataset contains simulation and experimental data presented in the paper titled 'Quasi-continuous frequency tunable terahertz quantum cascade lasers with coupled cavity and integrated photonic lattice'

1_b.xlsx contains data from simulation of normalised transmission data. This data corresponds to Fig.1(b) of the paper.

1_c.xlsx contains data from simulation of discrete tuning. This data corresponds to Fig.1(c) of the paper.

2_b.xlsx contains data from simulation of temporal variation of the lattice temperature in the lasing and the tuning cavities. This data corresponds to Fig.2(b) of the paper.

2_c.xlsx contains data from simulation of peak lattice temperature at the lasing and the tuning cavities as a function of the pulse width at the tuning cavity. This data corresponds to Fig.2(c) of the paper.

2_d.xlsx contains data from simulation of discrete tuning as a function of electrical heating power in the tuning cavity (driven with 95-us-wide pulses). This data corresponds to Fig.2(d) of the paper.

2_e.xlsx contains data from simulation of continuous tuning of coupled cavity modes at different electrical powers usupplied to the lasing cavity. This data corresponds to Fig.2(e) of the paper.

3_a_LIV.txt contains experimentally recorded light-current-voltage data. This data corresponds to Fig.3(a) of the paper.

3_b_Data.xlsx contains experimentally recorded and processed spectra at different tuning section power. This data corresponds to Fig.3(b) of the paper.

3_c_Data.xlsx contains experimentally recorded and processed spectra showing frequency coverage from the device. This data corresponds to the stacked spectral plot in Fig.3(c) of the paper.

3_c_Inset.xlsx contains experimentally recorded and processed spectra showing  continuous coverage centred at 2.22, 2.25, and 2.285 THz. SMSR from two spectra is also included. This data corresponds to Fig.3(c) inset of the paper.

4_b.xlsx contains simulation of continuous tuning as a function of electrical heating power in the tuning cavity. This data corresponds to Fig.4(b) of the paper.

4_c_Data.xlsx contains experimentally recorded and processed spectra. This data corresponds to Fig.4(c) of the paper.

4_c_Inset.xlsx contains weighted mean of the spectral power distribution (calculated from experimentally recorded data), and output THz power from the lasing cavity as a function of the peak electrical power supplied to the tuning cavity. This data corresponds to Fig.4(c)  inset of the paper.