Abstract
Optimised compression of femtosecond fibre laser pulses in highly nonlinear fibre is demonstrated. Specifically reported are compressed pulse durations below 30 fs using a simple setup where a single sub-10 cm segment of highly nonlinear fibre is directly spliced to the output pigtail of a commercial femtosecond fibre laser. The compressed pulse quality is confirmed through frequency resolved optical gating measurements.
Highlights
Motivated by diverse applications in spectroscopy, frequency metrology and telecommunications, the development of all fibre-format sources of sub-30 fs pulses around 1550 nm is a subject of much current interest [1]
In this Letter, we show that high quality nonlinear compressed pulses can be obtained using only one sub-10 cm length of readily-available highly nonlinear fibre (HNLF) directly spliced to the output singlemode fibre pigtail of a commercial femtosecond fibre laser
Frequency resolved optical gating (FROG) measurements were used to study compression of these pulses using a multisegment approach [4], but we found that excellent results could be obtained using the simple setup shown in Fig. 1 where only one segment of HNLF was directly spliced to a standard SMF-28 pigtail
Summary
Motivated by diverse applications in spectroscopy, frequency metrology and telecommunications, the development of all fibre-format sources of sub-30 fs pulses around 1550 nm is a subject of much current interest [1]. Reported are compressed pulse durations below 30 fs using a simple setup where a single sub- 10 cm segment of highly nonlinear fibre is directly spliced to the output pigtail of a commercial femtosecond fibre laser.
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