We have characterized both the amplitudes and the phases of the ninth harmonic pulses of the SH pulses of the TiS laser by developing XUV-XFROG. XUV pulses were found to be nearly transform-limited, which can be explained well by the single atom response calculated by a ZRP model including the depletion of neutral gas. Toward attosecond pulse generation, 8.5 fs pulses were generated at 400 nm by BFD. The average SH output powers were 1.6 W at 5 kHz and 1.9 W at 1 kHz with a 12-fs pulse width. The peak power and pulse energy were 0.16 TW and 1.9 mJ at a 1-kHz repetition rate, respectively. The throughput of the BFD system was 23 % at 1 kHz. This new blue light source with ultrashort pulses will be used for attosecond pulse production by high harmonics.
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