Tuning of a widely tunable monolithically integrated InP laser for optical coherence tomography

Bifurcation structure of a swept-source laser

“…The same model was able to describe the appearance of the so-called "sliding frequency mode-locking" in short cavity frequency swept lasers [18]. Shorter cavity length devices are appealing as comparably inexpensive and compact swept OCT sources and have recently attracted significant attention [7,[11][12][13]. These lasers, however, demonstrate wide range of dynamical regimes during the filter sweeping [18] detrimental to the performance of OCT sources, which were observed only in numerical simulations.…”

“…Swept-Source OCT is a technology that relies on coherent lasers that can scan hundreds of nanometers in a few microseconds to enable real time videos and, as a result, has found a wide range of medical applications in areas such as ophthalmology or cardiology [2]. To obtain such performance, researchers have developed novel frequency swept light sources, such as Fourier Domain Mode-Locked Lasers (FDML) [3], short external cavity lasers [4][5][6][7], Vertical Cavity Surface Emitting Lasers (VCSELs) with micro-electromechanical system (MEMS) driven filters [8][9][10][11], multi-section semiconductor lasers [12], and photonic integrated circuit devices [13]. The underlying operation principle of these devices relies on laser cavities incorporating a broad band gain medium and a fast tuning mechanism.…”

Frequency Stabilization of an InP-Based Integrated Diode Laser Deploying Electro-Optic Tuning

“…These are typically an order of magnitude smaller compared to field effects due to low doping levels. Since the current levels flowing through the PIN junction in reverse bias operation are in the order of some µA, thermo-optic tuning is expected to be negligible [12]. This is in contrast with the electric feedback applied on current injection phase sections and/or the laser SOA.…”

800 nm narrow linewidth tunable hybrid laser based on a dual micro-ring external cavity

“…The TripleX ® platform is an excellent platform to produce laser cavities 3 , as the high refractive index contrast allows for the creation of compact devices, and the large transparency window enables the design of lasers with a wide range of center wavelengths (405-2350 nm). Extending the availability of small, integrated tunable lasers towards lower wavelength than the standard telecom bandwidth will enable the use of these lasers in for example life sciences, quantum computing and sensing 4 .…”