Long-term wavelength stability of 1.55-μm tunable distributed Bragg reflector lasers

Mode referencing of an external cavity diode laser for continuous frequency stabilization

“…9 Of course, it is assumed that the mode profile initially recorded remains constant with time so that the device can operate in a continuous wavelength tuning mode without fail using the determined control parameters. Unfortunately, this is not the case for some widely tuneable laser diodes 10,11 and for the ECDL used in this work.…”

Monolithically Integrated, Widely-Tunable, Lasers

“…Simultaneously meeting the desired specifications for each segment would require a tunable laser with: high output power (>10 mW) [4], wide tuning range (>32 nm) [5], rapid wavelength tuning (< 10 ns) [6] direct or integrated modulation (≥ 2.5 GB/s) [3,5], high reliability (> 20 year MTTF) [7], and high volume production. The widely tunable, SG-DBR (Sampled Grating Distributed Bragg Reflector), laser is the only technology that has been shown to deliver on each of these areas, as the references indicate.…”

<title>Tunable two-section DBR lasers for ITU frequency standard</title>

“…Typically, three-section (3S) DBR lasers are used in applications where continuous tuning over large wavelength ranges is required. The only problem with these lasers is the need to control three currents to obtain a specified output power and wavelength; this requires complex control locking algorithm [3]. The reduction of one control current in two-section (2S) DBR devices mitigates this problem but due to their discontinuous tuning characteristic, the 2S-DBR lasers do not match the desired wavelengths only by current tuning; usually, a temperature control is also used in these cases [4].…”