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A 2×2 optical switch based on the carrier injection effect is demonstrated on GaAs/AlGaAs epitaxial material.At an injection current of 80 mA,the extinction ratio exceeds 25 dB at 1.55#m.The polarization sensitivity of the crosstalk is within ±0.5 dB.The switching speed is below 10ns.The flat response spectrum throughout the 1542-1562 nm wavelength range indicates that this device is insensitive to wavelength.