SBIR Phase I: Single-Mode Single-Polarization VCSELs at any Wavelength

SBIR 第一阶段：任何波长的单模单偏振 VCSEL

• 批准号: 1014127
• 负责人: Majid Riaziat
• 金额: --
• 依托单位: OEPIC SEMICONDUCTORS, INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1014127&HistoricalAwards=false
• 关键词: SBIR; Phase; Single; Mode; Polarization

This Small Business Innovation Research Phase I project proposes to use a novel approach to fabricate Vertical Cavity Surface Emitting Lasers (VCSELs) that are free from any wavelength limitations imposed by their host semiconductor substrate. These revolutionary VCSELs will operate in a single mode with high output power, narrow linewidth and stable linear polarization for use in spectroscopy and communications. In this approach, both semiconductor distributed bragg reflectors (DBRs) of the VCSEL are mostly eliminated. On one side, a high-contrast subwavelength grating (HCG) mirror is used for single-mode linearly polarized output. On the other side, the high reflector is replaced with a dielectric DBR. Using this combination, it is possible to build efficient single mode VCSELs at any wavelength covering near-infrared and approaching mid infrared (800nm to 2,500nm). High efficiency and high output power are achieved by very low electrical resistance and efficient heat sinking. The first prototype will have an emission wavelength of 1550nm with the ambitious goal of offering a preferred alternative to DFB lasers in long-haul fiber optic communications and near infrared spectroscopy. HCG fabrication and a complete design followed by epitaxial growth will be done in Phase I.The Broader Impacts / Commercial Potential of this project range from telecommunications to spectroscory. The developed devices will have the mode purity and linewidth of DFB lasers and the beam quality and low cost of a VCSEL at any near infrared wavelength with stable linearly polarized output. Immediate application areas are in telecommunications and spectroscopy. Of particular interest in communication systems are the reduction of cost per bit, and power consumption per bit of transmitted data. Implementing the proposed VCSELs in fiber optic transceiver units results in reduced cost and reduced power consumption over existing edge emitter based solutions. Reducing power consumption in turn leads to miniaturization and high density assembly that lead to further cost reduction. Up to now, long wavelength 1550nm VCSELs have not had the required characteristics to gain widespread use. Particularly challenging requirements for VCSELs to meet are high optical output power and narrow linewidth for long haul transmission. The proposed approach makes possible for these VCSELs to meet all the requirements and to potentially become an attractive alternative to edge emitting DFB lasers. The lack of wavelength constraints makes these sources ideal for overtone spectroscopy in the near infrared for environmental and security applications.

这个小型企业创新研究阶段I项目提议使用一种新型方法来制造垂直腔表面发射激光器（VCSEL），这些激光器（VCSELS）不受其宿主半导体底物施加的任何波长限制。这些革命性的VCSEL将以高输出功率，狭窄的线宽和稳定的线性极化用于光谱和通信的单个模式运行。在这种方法中，VCSEL的两个半导体分布式Bragg反射器（DBR）大多被消除。在一侧，高对比度亚波长光栅（HCG）镜用于线性极化输出。在另一侧，高反射器被介电DBR替换。使用这种组合，可以在任何波长覆盖近红外并接近中红外线（800nm至2,500nm）的波长下构建有效的单模式VCSEL。高效率和高输出功率是通过非常低的电阻和有效的散热器来实现的。第一个原型的发射波长为1550nm，其雄心勃勃的目标是在长途光纤通信和近红外光谱中提供首选的DFB激光器替代方案。 HCG制造和完整的设计，然后进行外延生长，将在阶段进行。该项目的更广泛的影响 /商业潜力范围从电信到光谱。开发的设备将具有DFB激光器的模式纯度和线宽，并具有稳定的线性偏振输出的任何近红外波长的VCSEL的光束质量和低成本。直接的应用领域是电信和光谱法。在通信系统中特别感兴趣的是降低每位成本，以及每位传输数据的功耗。在光纤收发器单元中实施拟议的VCSEL会导致成本降低和基于Edge Emitter的解决方案的功耗降低。减少功耗反过来导致微型化和高密度组装，从而进一步降低成本。到目前为止，长波长1550nm VCSEL尚未具有所需的特征来广泛使用。 VCSELS满足的特别具有挑战性的要求是高光输出功率和长途传输的狭窄线宽。提出的方法使这些VCSels满足所有要求，并有可能成为Edge发射DFB激光器的有吸引力的替代方法。缺乏波长限制使这些来源非常适合近红外光谱，用于环境和安全应用。