Monolithic Tunable Coupled-Cavity WDM Transmitter in a Generic Foundry Platform

Abstract

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A 6 × 30 Gb/s Tunable Transmitter PIC With Low RF Crosstalk From an Open-Access InP Foundry

“…Note here, that the values include the insertion loss of the modulators which is around 5 dB. Compared to the results in [17], thermal roll-off is less evident here and can be attributed to the offset introduced between the two gain sections. Jumps in the LI curve are caused by modehops that occur due to the increasing gain current and can be avoided in operation with proper tuning of phase sections of both cavities.…”

“…Lasing is achieved by biasing both gain sections above threshold and wavelength tuning by utilizing the Vernier effect through a combination of cavity mode tuning using the phase sections and its interplay with the MI filter response [21]. It has been shown that this concept can yield 25 nm of tuning range [17]. Fig.…”

“…Up to 20 nm of tuning range can be achieved. The previous design [17] has been adapted with respect to cavity lengths in order to properly fit the laser array into the transmitter footprint, resulting in a slightly lower tuning range. Furthermore, we improved on the layout by introducing a horizontal offset between the gain sections of both cavities.…”

“…Compared to the two other platforms [14], [15] it can offer tunable WDM transmitter fabrication at lower cost due to its simpler process. We have previously demonstrated that such a technology can realize tunable lasers and modulators for 10 Gb/s applications without the need of Bragg gratings or additional quantum well regrowths [17]. Optimization of the modulator design can further improve the line rate and we have presented initial results of a six channel 6 x 30 Gb/s tunable transmitter realized on the same platform [18].…”

Widely tunable multimode-interference based coupled cavity laser with integrated interferometer

“…This allows to coarsely select the lasing wavelength of the coupled system, extending the tuning range to several tens of nanometer. Compared to our previous results [22], we will present an analytical derivation of the interferometer response and show how the reflective inteferometer is used to self-stabilize the laser.…”