RELIABLE HIGH - POWER ( 40 mW ) STABILISED InGaAlP LASER DIODES WITH STRAINED ACTIVE

areas. Thermal crosstalk, whereby the wavelength of one laser is affected by the current flowing in its neighbours, is dependent on the spacing between adjacent lasers and the effectiveness of the heatsinking under the laser array. We measured less than O.lnm of wavelength change when current in an adjacent laser was changed by 80mA. Electrical crosstalk was minimised by careful design and layout, and was measured to be better than -20dB at 2.5 Gbit/s.