BBO-3B II

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BBO-3B II

By using a type II BBO crystal instead of a type I BBO crystal, the BBO-3B II gives a consistently narrow bandwidth over the same tuning range as the BBO-3B I while maintaining the simple design of the BBO-3B I and high efficiency. The efficiency for doubling the narrow band-width output of this OPO is as high as 45%.

Specifications

Specification	Value	Comments
Tuning Range	410 nm to 2400 nm	pumped @ 355 nm, single optics set
Nd:YAG pump requirement	<80 MW/cm²lasing threshold	smooth profile (gaussian or flat top)
Output pulse energy	see power spectrum	efficiency depends on pump energy
Bandwidth	< 6 cm^-1	maximum bandwidth
Pulse width	1-2 ns shorter than pump pulse	depends on actual pump pulse length
Beam diameter	2-5 mm	depends on input pump size

*All specifications are subject to change without notice.

¹ Bandwidth depends on pump intensity, beam size, divergence and pump bandwidth. For single frequency pump sources the maximum bandwidth ranges from sub-cm^-1 to below 2 cm^-1, e.g. from 1500nm to 2200nm BBO-3B II gives <1 cm^-1 resolution.

Photoacoustic spectrum of ammonia taken with the BBO-3B II with 5mJ energy in the 1.9mm region.

Power Spectrum of the BBO-3B II, pumped by

145mJ at 355nm. The pump laser is a Spectra-Physics GCR-16 Nd:YAG laser operating in single frequency mode. SHG covering 208nm to 415nm is achieved with three BBO crystals.

Physical Layout:

Same as BBO-3B I, could be upgraded from BBO-3B I by changing the modularized tuning block.