Though necessary and advantageous in many fields, the high coherence of lasers is detrimental to their performance certain applications, including illumination, imaging, projection. This due formation artifacts, commonly known as speckles, resulting from interference randomly scattering spatially coherent photons. It possible resolve this issue by increasing number mutually incoherent modes emi...

We demonstrate swept source OCT utilizing vertical-cavity surface emitting laser (VCSEL) technology for in vivo high speed retinal, anterior segment and full eye imaging. The MEMS tunable VCSEL enables long coherence length, adjustable spectral sweep range and adjustable high sweeping rate (50-580 kHz axial scan rate). These features enable integration of multiple ophthalmic applications into o...

We describe the design and development of a high-speed 8-channel hybrid integrated optical transceiver package with Clock and Data Recovery (CDR) circuits. The package concept has been developed to be compatible with microprocessor package technology and at the same time allow the integration of low cost, high-performance optical components. A 90nm CMOS optical transceiver chip, 850nm 10Gb/s Ga...

Over the past several years, high-speed vertical-cavity surface-emitting lasers (VCSELs) have been the subject of intensive worldwide research due to their applications in optical interconnects and optical data networks. The performance of VCSELs, especially with respect to their high-speed characteristics, has made significant progress. In this chapter, we first present the basic theory for cu...

A room temperature operating Vertical External Cavity Surface Emitting Laser is applied around 1550 nm to intracavity laser absorption spectroscopy analyzed by timeresolved Fourier transform interferometry. At an equivalent pathlength of 15 km, the high resolution spectrum of the semiconductor disk laser emission covers 17 nm simultaneously. A noise equivalent absorption coefficient at one seco...

We demonstrate that dynamical polarization switching in mutually coupled vertical-cavity surface-emitting lasers (VCSELs) has a profound impact on the chaotic dynamics in the system drastically improving the in-phase (anti-phase) synchronization between the modes of the two VCSELs with the same (orthogonal) polarizations. Furthermore, an exchange of the leader-laggard role is observed with the ...

In recent years, optical manipulation has gained increasing interest, especially in combination with microfluidics. The contamination-free handling of micrometer-sized particles without any mechanical contact is an attractive tool for biology and medicine. VCSELs (vertical-cavity surface-emitting lasers) are an excellent choice for the trapping lasers, offering the opportunity of miniaturizatio...

We report greatly enhanced modulation response of multimode vertical-cavity surface-emitting lasers (MM-VCSELs), for the first time, using optical injection locking. A 3-dB bandwidth of 38 GHz and 54 GHz resonance frequency are achieved using a MM-VCSEL with a 3 GHz free-running bandwidth. We show that transverse mode selection can be attained with optical injection locking through frequency an...

This paper presents the latest progress in the development, fabrication, and characterization of microfabricated atomic frequency references at NIST. With volumes below 10 mm the physics packages contain the complete integrated assembly for probing the ground-state hyperfine splitting frequency of the alkali atoms by coherent population trapping (CPT). This technique allows for a simple and com...

We present the procedures and results of quality control tests for front-end optical link components in ATLAS Liquid Argon Calorimeter Phase-1 upgrade. The include a Vertical-Cavity Surface-Emitting Laser (VCSEL) driver ASIC LOCld, custom transmitter/transceiver modules MTx/MTRx, transmitter LOCx2. MTx, LOCx2 each contain two channels with same structure, while MTRx has channel receiver channel...