Tunable laser based on a semiconductor optical amplifier of red spectral region

Abstract

A tunable laser containing a recently developed travelling wave semiconductor optical amplifier (SOA) of the red spectral region as an active element and an acousto-optic tunable filter in an external fibre ring cavity is studied. Continuous wavelength tuning was achieved within a spectra band up to 20 nm wide with a rate up to 104 nm s−1 at a spectral linewidth below 0.04 nm and a cw output power up to 2 mW. The use of one more similar SOA as an output power amplifier made it possible to increase the output power to 15 mW.

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

“…This is needed to amplify incoming light via stimulated emission [252]. SOAs are important for telecommunication wavelengths, but recent attention has been given to visible SOAs in support of the development of new technology platforms such as MOPAs [236] and swept sources [253]. Integration of an SOA alongside a laser in a chip opens a pathway for realizing visible-range photonic integrated circuits that could exhibit immunity to the intrinsic optical loss of visible-light waveguides [254].…”

Single-Port Superluminescent-Diode Gain-Chip for Tunable Single-Wavelength and Dual-Wavelength Blue-Laser

“…An alternative to AR coatings is the use of a tilted facet or a tilted waveguide such as those found in superluminescent diodes (SLDs), leading to a modal reflectivity below 10 -5 via a single etching step [15], [16]. Previously, the implementation of tunable lasers based on SLDs in EC configurations focused on the near-infrared and red wavelength regime [17]- [21]. The closest investigations using InGaN-based devices are SLD or its closely-related semiconductor optical amplifier (SOA) inside an EC to generate mode-locked pico-second lasing pulses [22], [23], and narrowlinewidth laser emission for atomic spectroscopy [14].…”

Miniature multi‐pass cell design with high path‐to‐volume ratio based on trough reflector

“…Laser absorption spectroscopy based on Lambert-Beer law has been widely applied to trace gas concentration detection for air quality assessment, exhaled breath diagnosis and industrial emission monitoring. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] It is commonly combined with optical multi-pass cell (MPC) to increase the effective optical path length (OPL). [17][18][19][20] Nowadays, unmanned aerial vehicle (UAV) detection, 21,22 and automobile loading have been demanded due to their convenience and versatility.…”

“…Laser absorption spectroscopy based on Lambert–Beer law has been widely applied to trace gas concentration detection for air quality assessment, exhaled breath diagnosis and industrial emission monitoring 1–16 . It is commonly combined with optical multi‐pass cell (MPC) to increase the effective optical path length (OPL) 17–20 .…”