Toward a Feedback-Insensitive Semiconductor Laser

Abstract

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High coherence collapse of a hybrid III–V/Si semiconductor laser with a large quality factor

“…Very recently, multiple solutions to reach optical feedback insensitivity have been investigated. For instance, a new type of optical feedback insensitive integrated semiconductor ring laser was introduced with an optical isolator included in the optical cavity [6]. However, despite the observed 5 dB of isolation and 3 dB increase of tolerance for external optical feedback, the gain in terms of feedback insensitivity is quite limited due to a very complex structure where additional parasitic reflections may also occur [6].…”

“…For instance, a new type of optical feedback insensitive integrated semiconductor ring laser was introduced with an optical isolator included in the optical cavity [6]. However, despite the observed 5 dB of isolation and 3 dB increase of tolerance for external optical feedback, the gain in terms of feedback insensitivity is quite limited due to a very complex structure where additional parasitic reflections may also occur [6]. In order to maintain a much simpler laser design, other configurations can be considered such as those based on nanolasers [7] or quantum dot (QD) material systems [8].…”

“…The high level of the CC regime permits a 10 Gbps error-free transmission over a 10 km fiber coil. We believe that compared to the aforementioned solutions, the one proposed in this study does not require neither a complex design [6], nor a nanocavity [7], nor epitaxial growth of QDs [8], nor the utilization of any artificial solution (e.g. external cavity) [17].…”

Laser diodes with modulated optical injection: towards a simple signal processing unit?

“…Lasers and, in particular, semiconductor lasers are well known for having rich and complex dynamical behaviour intrinsically linked to exciting physical features and with the potential to lead to cutting-edge applications [1][2][3]. While one of the main practical interests at first was to understand how to avoid instabilities -which, by the way, still remain a significant issue nowadays [4][5][6]-the field has largely outgrown this initial problem to tackle a wide variety of topics: from application of optical chaos-chaos communication, random number generation or random key distribution [3]-to all-optical processing, high-frequency signal generation, RF over fiber or LIDAR systems [7][8][9][10]. These topics of research are also indirectly supported by the impressive growth of both the fields of microwave photonics [7,11] and photonic integration [12].…”

“…On the one hand, the success of the former opens important opportunities for the field of laser dynamics as its successful development creates a fruitful and suitable context for harnessing the targeted behaviour and applications [7,9,13]. On the other hand, the latter makes it finally possible to overcome notorious stability issues and to drastically increase the complexity of a system without unreasonably increasing its cost and bulkiness [6,[14][15][16]. Simultaneously, generic foundry platforms and multi-project wafer runs also offer the exciting chance to make custom lasers and systems without the need to master all the steps of photonic integrated circuit growth [6,17,18].…”