We report the experimental observation of two-dimensional vector cavity solitons in a Vertical-Cavity Surface-Emitting Laser (VCSEL) under linearly polarized optical injection when varying optical injection linear polarization direction. The polarization of the cavity soliton is not the one of the optical injection as it acquires a distinct ellipticity. These experimental results are qualitativ...

We present our recent work on high-speed optical interconnects with advanced modulation formats and directly modulated 850 nm VCSELs. Data transmission at nearly 100 Gbps was achieved with 4-PAM. Forward error correction, equalization and preemphasis are also explored. The system aspects of the advanced modulation formats and their impact on the VCSEL requirements are discussed. Requirements on...

A vertical-cavity surface-emitting laser (VCSEL) driver design that utilizes a novel push-pull circuit topology is described. The VCSEL driver design can provide both a current pushing and a current pulling mechanism and therefore is capable of producing symmetric rise and fall times. The design was implemented in a 0.18-microm foundry n-well complementary metal-oxide semiconductor technology a...

We present measurements regarding the long-term frequency stability of NIST chip-scale atomic clock (CSAC) physics packages. Changes of the clock frequency are caused mainly through time-dependent light shifts by the frequency-modulated VCSEL and properties of the vapor cell. We suggest advanced CPT interrogation schemes to relax the requirements on the temperature stability of the VCSEL as wel...

Turn-oo transients in current-modulated weakly-index-guided vertical-cavity surface-emitting lasers (VCSELs) are analyzed by using a model that takes into account all the transverse modes supported by the waveguide. Turn-oo transients strength is maximum for the current at which the VCSEL enters the multi-transverse-mode regime. Their strength signiicatively decreases for the multi-mode regime ...

Acknowledgements I would like to express my deep appreciation to my supervisor, Dr. Dennis G. Deppe, for leading me into the exciting semiconductor laser field and for his inspiring and insightful guidance throughout this course of research. In addition, I would like to thank my excellent committee members, Dr. learned semiconductor processing and MBE crystal growth 101 from them, and also rece...

A compact UV pulsed laser pumped by high-power two-dimensional arrays of vertical-cavity surface-emitting lasers (VCSELs) was presented. A passively Q-switched 1064-nm Nd:YAG laser was side-pumped by kW-class 808-nm VCSEL pump modules and the output pulses were frequency quadrupled to 266-nm. 10-ns, 0.68-mJ UV pulsed output was obtained at 1.33k-Hz repetition rate. The average UV power is > 0.9...

We optimize the wavelength tuning range of a Vertical-Cavity Surface-Emitting Laser with an intracavity layer of nematic Liquid Crystal (LC-VCSEL) lasing around 1.3 μm. The tunability is obtained by applying voltage to the liquid crystal layer, which esentially is to vary the refractive index from the extraordinary to the ordinary. We achieve 71.6 nm continuous tuning (without mode hopping) wit...

We report a novel verticalcavity surface-emitting lasers (VCSEL) with monolithically integrated phaseshifters. Optical beams emitting at angles of 0" to 9.6" from the surface-normal direction have been achieved. Dynamic switching of the radiation angle has also been successfully demonstrated by tuming on/off the phase-shifted region of the VCSEL. This novel device can reduce the complexity and ...

Consider the typical VCSEL structure in Figure 1. In this example, the gain region consists of three quantum wells placed in a one-wavelength thick spacer region. On either side of the spacer region, there are extremely high reflectivity mirrors made from semiconductors that have total reflectivity greater than 99.5%. The mirrors are fabricated from altering material layers that are λ/4 thick t...