Semiconductor Laser with Optical Feedback - Bulk - 16GHz Detection Bandwidth - Temperature Variation

Output power time series from an edge-emitting, multiple quantum well 830nm semiconductor laser subject to optical feedback. Time series recorded for different combinations of optical feedback level, laser injection current and device temperature. Detection bandwidth 16 GHz and sampling rate 50 GSa/s.

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Author Joshua P. Toomey
Maintainer Dr Joshua P Toomey, MQ Photonics Research Centre, Dept of Physics and Astronomy, Macquarie University
Version 1.0
data_type Time Series
detailed_info This data is being provided to be used in the context of the SIEF project 'Big Data Knowledge Discovery'. This data set was recorded from an experimental semiconductor laser subject to optical feedback operating at different temperatures over the period from 1/02/13 to 15/2/13. Laser wavelength ~ 830nm. External cavity round trip time 4.5ns. During each temperature experiment, 2 system parameters were varied: the optical feedback level and laser injection current. - Optical feedback was varied by changing the RF power to an acousto-optic modulator (AOM) which varies the amount of laser power transmitted in the 0th order beam. A voltage between 0V-1V corresponds to maximum transmission (0V) and minimum transmission (1V). The actual power transmitted by the AOM is not a linear relationship with voltage. Relative feedback level can be approximated from the reduction in laser threshold. - Laser injection is controlled by directly varying the current supply to the device (Profile ITC502 Laser Diode Combi-controller). This full parameter sweep was performed with the laser operating at a range of temperatures from 25C to 35C (in 1C steps). The dataset contains 554,961 hdf5 files containing output power time series recorded from the laser using a fast photodiode (Discovery Semiconductors DCS30S 22GHz) and 16GHz realtime oscilloscope (Tektronix DSA72004C) for different settings of: - Temperature (11 values = 25C to 35C in 1C steps) - Injection (251 values = 45mA to 70mA in 0.1mA steps) - Feedback (201 values from 0.4V to 0.8V in 0.002V steps) The filenames contain the INJ, AOM and TEMP values at which the data was recorded: e.g. INJ_45.2mA_AOM_0.642V_TEMP_29C.h5 : Injection current = 45 mA, AOM voltage = 0.642 V, device temperature = 29 degrees Celsius. Each hdf5 file consist of a single dataset called 'TimeSeries'. This contains a time series of amplitude values measured as the voltage across the 50ohm oscilloscope input. Time series were sampled at 50GSamples/s (20ps per data point) and contain 50,000pts for a total record length of 1microsecond.
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