In summary, we achieved a 1485 nm eye-safe intra-cavity diamond cascaded Raman laser with substantial peak ability and slender linewidth. Benefitting from the usage of composite crystal and in-band pumping and The great manner matching supplied by the V-shaped folded cavity, the unit attained an average output ability of 2.
The large acquire serves as the inspiration for amplifying gentle signals, contributing to the greater intensive and targeted output laser beam that Yb:Er:glass is recognized for.
Regardless of the numerous strides in safety that eye-safe lasers have brought about, they are not without the need of their pitfalls.
: Thulium-doped products are really economical, offering superior output ability with negligible input Vitality. Their operational wavelength guarantees safety, making them appropriate for programs like distant sensing and laser radar devices.
The concept of emission wavelengths lies within the pretty Main of laser know-how, dictating numerous parameters which include penetration depth, ability density, and safety actions. It’s no coincidence that Yb:Er:glass and Tm:YAG, two notable laser crystals, are pointed out for their eye-safe wavelengths.
Buyers who're unaware of the risk could unintentionally expose by themselves to harmful laser radiation.
Correspondingly, the beam radius of the fundamental laser on the diamond is usually properly held beneath a hundred µm. The above mentioned success reveal the V-shaped folded cavity On this perform has an excellent thermal stability, that can guarantee a large performance, In particular a higher output power in the following.
Amongst the primary pitfalls connected to eye-safe lasers is definitely the incorrect assumption that they're totally safe. Simply because they are labeled as ‘eye-safe,�?there is often a tendency to become complacent with safety steps.
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Significant regular electrical power and superior repetition price eye-safe Raman laser driven by a two-crystal Nd:YVO4 laser
Below, we proposed a V-formed folded cavity to realize successful operation of an eye-safe intra-cavity diamond cascaded Raman laser. Within the a person hand, the thermal effect in the laser crystal was mitigated due to utilization of composite crystal As check here well as in-band pumping, and on the other hand, the method matching and cavity steadiness are promoted via the V-formed folded cavity. Therefore, an average output power of two.2 W with a diode to second-Stokes conversion performance of eight.one% has been successfully attained. The heart beat width of the next-Stokes laser was dramatically decreased from sixty ns of the basic laser to 1.1 ns due to the Raman pulse compression, and this triggered a peak electricity of up to 40 kW.
8%. So as to avoid damage to the laser crystals as well as cavity mirrors, we did not further enhance the incident pump electricity through the experiments. The above mentioned effects validate that the folded cavity is properly designed and maintains very good stability underneath this kind of large pump stage. Determine 3(b) displays the basic laser emission spectrum, which supplies a spectral width of 0.fifteen nm. Just one pulse form of the basic laser which has a pulse width of 60 ns is shown from the inset of Fig. 3(b). For the reason that extensive cavity duration has a tendency to cause multiple longitudinal mode oscillations, it is likely that the multiple peaks of the fundamental laser pulse shape are attributable to the conquer frequency of multiple essential longitudinal modes[36].
During this letter, utilizing a chemical-vapor-deposition developed diamond as Raman get medium and also a 1080 nm fiber laser as pump source, we report a steady-wave second-Stokes Raman laser with emission…
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Eye Safe Laser Crystal Module The injury threshold for human eye is significant when a laser by using a wavelength bigger than one.four um, for the reason that when it is irradiated towards the human eye, nearly all of its mild intensity is absorbed from the vitreous physique, so It isn't straightforward to break the retina at a specific electrical power.( Having the 1.57um laser for instance, according to the US national security specifications, its safe exposure to human eye is 400 thousand situations that of your one.06um Nd:YAG laser at present utilized.