Professional Education


  • Bachelor of Science, Unlisted School (2007)
  • Doctor of Philosophy, Lehigh University (2016)
  • Master of Science, Unlisted School (2010)

Lab Affiliations


All Publications


  • Mode of Anti-Stokes Fluorescence Cooling in a Single-Mode Optical Fiber JOURNAL OF LIGHTWAVE TECHNOLOGY Knall, J. M., Esmaeelpour, M., Digonnet, M. F. 2018; 36 (20): 4752–60
  • High-resolution slow-light fiber Bragg grating temperature sensor with phase-sensitive detection OPTICS LETTERS Arora, A., Esmaeelpour, M., Bernier, M., Digonnet, M. F. 2018; 43 (14): 3337–40

    Abstract

    This Letter reports a slow-light fiber Bragg grating (FBG) temperature sensor with a record temperature resolution of ∼0.3  m°C/√Hz, a drift of only ∼1  m°C over the typical duration of a measurement (∼30  s), and negligible self-heating. This sensor is particularly useful for applications requiring the detection of very small temperature changes, such as radiation-balanced lasers and the measurement of small absorptive losses using calorimetry. The sensor performance is demonstrated by measuring the heat generated in a pumped Yb-doped fiber. The sensor is also used to measure the slow-light FBG's very weak internal absorption loss (0.02  m-1), which is found to be only ∼2% of the total loss.

    View details for DOI 10.1364/OL.43.003337

    View details for Web of Science ID 000438867400036

    View details for PubMedID 30004500

  • Power Fluctuations of Intermodal Four-Wave Mixing in Few-Mode Fibers JOURNAL OF LIGHTWAVE TECHNOLOGY Esmaeelpour, M., Essiambre, R., Fontaine, N. K., Ryf, R., Toulouse, J., Sun, Y., Lingle, R. 2017; 35 (12): 2429–35
  • Transmission Over 1050-km Few-Mode Fiber Based on Bidirectional Distributed Raman Amplification JOURNAL OF LIGHTWAVE TECHNOLOGY Esmaeelpour, M., Ryf, R., Fontaine, N. K., Chen, H., Gnauck, A. H., Essiambre, R., Toulouse, J., Sun, Y., Lingle, R. 2016; 34 (8): 1864–71
  • Wavelength-selective switch with direct few mode fiber integration OPTICS EXPRESS Marom, D. M., Dunayevsky, J., Sinefeld, D., Blau, M., Ryf, R., Fontaine, N. K., Montoliu, M., Randel, S., Liu, C., Ercan, B., Esmaeelpour, M., Chandrasekhar, S., Gnauck, A. H., Leon-Saval, S. G., Bland-Hawthorn, J., Salazar-Gil, J. R., Sun, Y., Gruner-Nielsen, L., Lingle, R. 2015; 23 (5): 5723–37

    Abstract

    The first realization of a wavelength-selective switch (WSS) with direct integration of few mode fibers (FMF) is fully described. The free-space optics FMF-WSS dynamically steers spectral information-bearing beams containing three spatial modes from an input port to one of nine output ports using a phase spatial light modulator. Sources of mode dependent losses (MDL) are identified, analytically analyzed and experimentally confirmed on account of different modal sensitivities to fiber coupling in imperfect imaging and at spectral channel edges due to mode clipping. These performance impacting effects can be reduced by adhering to provided design guidelines, which scale in support of higher spatial mode counts. The effect on data transmission of cascaded passband filtering and MDL build-up is experimentally investigated in detail.

    View details for DOI 10.1364/OE.23.005723

    View details for Web of Science ID 000350878500032

    View details for PubMedID 25836802

  • Mode-multiplexed transmission over conventional graded-index multimode fibers OPTICS EXPRESS Ryf, R., Fontaine, N. K., Chen, H., Guan, B., Huang, B., Esmaeelpour, M., Gnauck, A. H., Randel, S., Yoo, S. B., Koonen, A. J., Shubochkin, R., Sun, Y., Lingle, R. 2015; 23 (1): 235–46

    Abstract

    We present experimental results for combined mode-multiplexed and wavelength multiplexed transmission over conventional graded-index multimode fibers. We use mode-selective photonic lanterns as mode couplers to precisely excite a subset of the modes of the multimode fiber and additionally to compensate for the differential group delay between the excited modes. Spatial mode filters are added to suppress undesired higher order modes. We transmit 30-Gbaud QPSK signals over 60 WDM channels, 3 spatial modes, and 2 polarizations, reaching a distance of 310 km based on a 44.3 km long span. We also report about transmission experiments over 6 spatial modes for a 17-km single-span experiment. The results indicate that multimode fibers support scalable mode-division multiplexing approaches, where modes can be added over time if desired. Also the results indicate that mode-multiplexed transmission distance over 300 km are possible in conventional multimode fibers.

    View details for DOI 10.1364/OE.23.000235

    View details for Web of Science ID 000349162900023

    View details for PubMedID 25835670

  • Distributed Raman Amplification based Transmission over 1050-km Few-Mode Fiber Ryf, R., Esmaeelpour, M., Fontaine, N. K., Chen, H., Gnauck, A. H., Essiambre, R., Toulouse, J., Sun, Y., Lingle, R., IEEE IEEE. 2015
  • Review of Experimental Observations of Intermodal Nonlinearities in a Few-Mode Fiber Essiambre, R., Ryf, R., Mestre, M. A., Fontaine, N., Esmaeelpour, M., IEEE IEEE. 2015
  • Measurements of Frequency Instabilities and Slow Random Evolution of Inter-Modal Four-Wave Mixing in Few-Mode Fibers Esmaeelpour, M., Essiambre, R., Fontaine, N. K., Ryf, R., Toulouse, J., IEEE IEEE. 2015
  • 305-km Combined Wavelength and Mode-Multiplexed Transmission over Conventional Graded-Index Multimode Fibre Ryf, R., Fontaine, N. K., Guan, B., Huang, B., Esmaeelpour, M., Randel, S., Gnauck, A. H., Chandrasekhar, S., Adamiecki, A., Raybon, G., Tkach, R. W., Shubochkin, R., Sun, Y., Lingle, R., IEEE IEEE. 2014
  • Mode-Division Multiplexing Over 96 km of Few-Mode Fiber Using Coherent 6 x 6 MIMO Processing JOURNAL OF LIGHTWAVE TECHNOLOGY Ryf, R., Randel, S., Gnauck, A. H., Bolle, C., Sierra, A., Mumtaz, S., Esmaeelpour, M., Burrows, E. C., Essiambre, R., Winzer, P. J., Peckham, D. W., McCurdy, A. H., Lingle, R. 2012; 30 (4): 521–31
  • Mode-Equalized Distributed Raman Amplification in 137-km Few-Mode Fiber Ryf, R., Sierra, A., Essiambre, R., Randel, S., Gnauck, A. H., Bolle, C., Esmaeelpour, M., Winzer, P. J., Delbue, R., Pupalaikise, P., Sureka, A., Peckham, D. W., McCurdy, A., Lingle, R., IEEE IEEE. 2011
  • Coherent 1200-km 6 x 6 MIMO Mode-Multiplexed Transmission over 3-core Microstructured Fiber Ryf, R., Sierra, A., Essiambre, R., Gnauck, A. H., Randel, S., Esmaeelpour, M., Mumtaz, S., Winzer, P. J., Delbue, R., Pupalaikis, P., Sureka, A., Hayashi, T., Taru, T., Sasaki, T., IEEE IEEE. 2011