The integrated optic spectrum analyzer is adevice which u t i l i z e s the Bragg interaction between a SAW and a guided o p t i c a l beam to perform spectral analysis. Hughes has developed the f i r s t f u l l y integrated IOSA which uses a butt-coupled GaAlAs semiconductor laser, a LiNbO3 waveguide substrate, a 400 MHz bandwidth SAW transducer and a s i l i c o n detector/CCD array chip. The completed device exhibited a 3 dB bandwidth of 380 MHz with 10%/watt deflection efficiency a t hopt. = 0.82 Um. tion w a s found t o be 8 MHz and the dynamic range was greater than 20 dB. D a t a is also discussed on a modified chirp transducer which exhibits a 450 MHz acousto-optic bandwidth with a center frequency of 1.0 GHz.