We report on a linear cavity erbium-doped fibre laser with a large tuning range of 1509-1621 nm. We obtain a 1 dB flat tuning range of 1538-1613nm and a 3dB tuning range of 1516-1621nm. The threshold at 1580nm is 6.1 mW, the slope efficiency is 0.193 and the output power is 18.2mW, when 100mW pump power at 1480nm is provided. High signal-to-noise ratios of better than 60 dB are achieved within all the tuning ranges.