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Different conical emission (CE) pattes are obtained experimentally at various incident powers and beam sizes of pump laser pulses with pulse durations of 7fs, 44fs and lOOfs.The results show that it is the incident power but not the incident power density that determines a certain CE patte.In addition, the critical powers for similar CE pattes are nearly the same for the laser pulses with the same spectral bandwidth.Furthermore, as far as a certain CE patte is conceed, the wider the spectral bandwidth of pump laser pulse is, the higher the critical power is.This will hopefully provide new insights for the generation of CE patte in optical medium.