ECE 183 2012 Lab #3 Tunable laser diode (Agility)

laser assembly (TLA). The TLA includes a microprocessor and other control electronics
to support laser commands (Fig.7). These commands may be accessed using the
evaluation software or directly through the TLA interface.
III. EXPERIMENTS
Fig.7. Evaluation board with mounted SG-DBR laser.
You will be using Anritsu Optical Spectrum Analyzer (OSA), model MS9710B.
Switch-on Procedure of the Optical Spectrum Analyzer.
• Switch-on the line power of OSA.
• Set the spectrum analyzer center wavelength to 1520 nm and the span to 200 nm.
• Set the wavelength resolution to the maximum of 0.07 nm.
• Set the vertical scale to be logarithmic.
A. Spectral Characteristics of LD
In this experiment you will be measuring the optical spectrum of a LD, operating in the
near-infrared (NIR) region with a center wavelength around 1550 nm.
- Use the fiber patch-cord to couple the light from the LD to the OSA.
Note that the fiber connector has notch, and correctly fits into the receptacle in only
one orientation.
- Set ILD current at 5mA and observe the optical spectrum of the emitted light.
- Measure the center wavelength and bandwidth of the output spectrum on -3db (FWHM)
level.
- Set ILD current at 50mA and repeat measurements
6