To realize broad tunable range in 0.4-2.0 μm of BBO ΟΡΟ without changing optical components, two kinds of cavity configurations such as double right-angle prisms ring cavity and linear cavity pumped from side direction with two walk-off compensating crystals were used. Although the longer resonator and high intracavity loss lead to higher threshold, both the configurations can ensure the broad tunable output with the range of 0.43-0.65 μm for signal and 0.78-2.01 μm for idler without changing mirrors or crystals.