Tunable Laser Array Research Articles

Simultaneous operation of ten-channel tunable DFB laser arrays using strained-InGaAsP multiple quantum wells

Simultaneous operation of a ten-channel tunable multisection lambda /4-shifted distributed-feedback (DFB) laser array using strained-InGaAsP multiple quantum wells is described. The lasing frequencies of the ten channels are all set in a single 10-GHz space, with each channel maintaining a narrow linewidth of less than 2.3 MHz. This array has potential applications for optical frequency-division-multiplexing systems.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Multiple wavelength tunable surface-emitting laser arrays

Techniques to achieve wavelength multiplexing and tuning capabilities in vertical-cavity surface-emitting lasers (VCSELs) are described, and experimental results are given. The authors obtained 140 unique, uniformly separated, single-mode wavelength emissions from a 7*20 VCSEL array. Large total wavelength span ( approximately 430 AA) and small wavelength separation ( approximately 3 AA) are obtained simultaneously with uncompromised laser performance. All 140 lasers have nearly the same threshold currents, voltages, and resistances. Wavelength tuning is obtained by using a three-mirror coupled-cavity configuration. The three-mirror laser is a two-terminal device and requires only one top contact. Discrete tuning with a range as large as 61 AA is achieved with a small change in drive current of only 10.5 mA.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>