10 kHz linewidth 1.5 μm InGaAsP external cavity laser with 55 nm tuning range

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10 kHz linewidth 1.5 μm InGaAsP external cavity laser with 55 nm tuning range

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© The Institution of Electrical Engineers
Published

An InGaAsP 1.5 μm laser, with one facet antireflection coated, has been incorporated into a diffraction grating external cavity. The lasing wavelength could be tuned over a 55 nm range about the centre wavelength of 1.5 μm by rotating the grating. Furthermore, it was found that the emission spectrum was extremely narrow; beat-frequency measurements at 1523 nm against an HeNe laser showed it to be of the order of 10 kHz.

Inspec keywords: diffraction gratings; laser cavity resonators; laser tuning; gallium arsenide; semiconductor junction lasers; III-V semiconductors; antireflection coatings; indium compounds

Other keywords: beat-frequency measurements; III-V semiconductors; external cavity laser; HeNe laser; diffraction grating; antireflection coating; emission spectrum; 10 kHz linewidth 1.5 micron InGaAsP laser

Subjects: Laser resonators and cavities; Semiconductor lasers; Lasing action in semiconductors; Gratings, echelles; Laser resonators and cavities

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