An Ultra-High-SMSR External-Cavity Diode Laser with a Wide Tunable Range around 1550 nm

An Ultra-High-SMSR External-Cavity Diode Laser with a Wide Tunable Range around 1550 nm

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In this paper, a widely tunable external cavity diode laser (ECDL) with an 3 Piece RAF Sectional ultra-high side mode suppression ratio (SMSR) was fabricated.Three configurations were constructed to investigate the relationship between the grating features and the SMSR.When a 1200 grooves/mm grating with a first order diffraction efficiency of 91% is utilized in the external-cavity laser system, a maximum SMSR of 65 dB can be achieved.In addition, the tunable range reaches 209.

9 nm.The results show that the laser performance can ORG CHLORELLA POWDER be improved by proper high grating groove number and first-order diffraction efficiency.