Electroabsorption modulators with polarisation independence of chirp and transmission (TE/TM sensitivity <0.4dB at 1550nm) over a wide wavelength range from 1540nm to 1560nm have been realised using tensile strained InGaAsP quantum wells. The fabricated devices show 42GHz modulation bandwidth and 1.8V drive voltage, resulting in a high bandwidth-to-drive-voltage ratio of 23.3GHz/V.