Cotest's SPT-EDU is a cost-effective photonics education system  that  adapts  industry-standard  light  source  testing methodologies into simplified lab workflows for vocational and university students.Designed to bridge academic training and industrial  practices,its  base  configuration  enables  hands-on experimentation  with   LIV   characteristics(threshold   current, operating voltage/current),while expandable modules support spectral analysis and near/far-field optical characterization. This experimental system can also support scientific research tests of college teachers within certain specifications,achieving multi-purpose use of a single device.