Polarization investigation of a tunable high-speed short-wavelength bulk-micromachined MEMS-VCSEL

• We report the investigation of the state of polarization (SOP) of a tunable vertical-cavity surface-emitting laser (VCSEL) operating near 850 nm with a mode-hop free single-mode tuning range of about 12 nm and an amplitude modulation bandwidth of about 5 GHz. In addition, the effect of a sub-wavelength grating on the device and its influence on the polarization stability and polarization switching has been investigated. The VCSEL with an integrated sub-wavelength grating shows a stable SOP with a polarization mode suppression ratio (PMSR) more than 35 dB during the tuning.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Polarization stability

Tunable VCSEL

Tunable laser

Vertical-cavity surface emitting laser

Optical waveguides

Sub-wave length grating

State of polarization

VCSEL

sub-wavelength grating

Polarization switching

MEMS

Single mode

Tuning ranges

Microoptics

Polarization modes

Laser tuning

Short-wavelength

High-speed

Bulk-micromachined

Surface emitting lasers

Diffraction gratings

Polarization

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