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March 27th, 2017 | Company News

The gigajet aids astrocomb research at SALT

Last year Heriot Watt University installed a Laser Quantum gigajet and finesse pure CEP 532 nm pump laser to the 10 m Southern African Large Telescope (SALT), to deliver complete calibration of one channel of its high-resolution spectrograph and an accurate determination of its resolving power. The recently released paper ‘Wavelength calibration of a high-resolution spectrograph with a partially stabilised 15-GHz astrocomb from 550 to 890 nm’ details the on-sky spectroscopy results along with direct calibration achieved entirely using the astrocomb.

The gigajet, a forerunner to the current taccor, is a 1 GHz femtosecond Ti:Sapphire oscillator delivering 20 fs pulses with a wavelength centred at 807 nm and 1.2 W average power. The temperature controlled housing ensures it provides a stable performance over long periods of time. The finesse pure CEP, an industry-leading performer, has a beam pointing stability of <2 µrad/ᵒC and typical noise value of 0.02% RMS (<10 W <0.03% RMS). The finesse pure CEP delivers exceptionally high specification output, which was ideally suited to this experiment, please read the full publication here.



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