D.F. Zaitsev

Directly modulated high-power quantum-well lasers are promising for nanophotonic links in AESA, in transmitters of Radio-over-Fiber (RoF) technology, including systems of the broadband wireless Internet with wide zone of coverage (WiMAX), as well as in open laser communication. Direct experimental verification of frequency properties of high-power lasers is problematic because of significantly increased influence of parasitic elements of equivalent circuit, as the power lasers, and schemes of their modulation (eyeliner modulated radio signal). On the other hand, presented experimental assessment of the potential performance of powerful QW lasers, made by the method of measurement of frequency of relaxing peak relative noise laser (RIN) without modulation, is free from the influence of parasitic elements of electric circuits eyeliner RF signal, as with laser resonators FP, as well as for multi-frequency and single-frequency DFB lasers. This article presents the results of experimental research of the frequency potential of the quasi-continuous (CW) mode powerful (more than 1 W) quantum-well (QW) lasers at high levels of their pumping. Theoretically calculated frequency response of powerful InGaAs laser diode, excluding circuit's parasitic elements, is compared with experimental data, obtained with the RIN method of measurement in a wide frequency band as well as in CW mode at high level of pumping (I н / I th  10). The results indicate opportunities for increased values of product of modulation bandwidth to output modulated optical power for high-power lasers while minimizing parameters of circuit's parasitic elements.