OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 23570–23581

A new technique for 100-fold increase in the FSR of optical recirculating delay line filters using a time compression unit

T. A. Nguyen, E. H. W. Chan, and R. A. Minasian  »View Author Affiliations

Optics Express, Vol. 20, Issue 21, pp. 23570-23581 (2012)

View Full Text Article

Enhanced HTML    Acrobat PDF (1082 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A new technique that increases the free spectral range (FSR) of a recirculating delay line filter, is presented. The concept is based on a time-compression unit, which is used in conjunction with a frequency-shifting recirculating loop that generates multi-spectral characteristics, and the idea exploits the optical wavelength domain by wavelength-to-time mapping of the taps using an oppositely time-oriented dispersive element so that the taps travel different lengths, to time compress the tap separation. This technique solves, for the first time, the long-standing problem of the small FSR limitation in recirculating microwave photonic delay line filters, opening the way to realize the main functionalities required in microwave photonic filters. Experimental results are presented which demonstrate a large 100-fold increase in the FSR of the bandpass filter response.

© 2012 OSA

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(070.2615) Fourier optics and signal processing : Frequency filtering
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 18, 2012
Revised Manuscript: September 13, 2012
Manuscript Accepted: September 22, 2012
Published: September 28, 2012

T. A. Nguyen, E. H. W. Chan, and R. A. Minasian, "A new technique for 100-fold increase in the FSR of optical recirculating delay line filters using a time compression unit," Opt. Express 20, 23570-23581 (2012)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. R. A. Minasian, “Photonic signal processing of microwave signals,” IEEE Trans. Microw. Theory Tech.54(2), 832–846 (2006). [CrossRef]
  2. J. Capmany, B. Ortega, D. Pastor, and S. Sales, “Discrete-time optical processing of microwave signals,” J. Lightwave Technol.23(2), 702–723 (2005). [CrossRef]
  3. J. Mora, L. R. Chen, and J. Capmany, “Single-bandpass microwave photonic filter with tuning and reconfiguration capabilities,” J. Lightwave Technol.26(15), 2663–2670 (2008). [CrossRef]
  4. T. X. H. Huang, X. Yi, and R. A. Minasian, “New multiple-tap, general-response, reconfigurable photonic signal processor,” Opt. Express17(7), 5358–5363 (2009). [CrossRef] [PubMed]
  5. X. H. Feng, C. Lu, H. Y. Tam, and P. K. A. Wai, “Reconfigurable microwave photonic filter using multiwavelength erbium-doped fiber laser,” IEEE Photon. Technol. Lett.19(17), 1334–1336 (2007). [CrossRef]
  6. E. Hamidi, D. E. Leaird, and A. M. Weiner, “Tunable programmable microwave photonic filters based on an optical frequency comb,” IEEE Trans. Microw. Theory Tech.58(11), 3269–3278 (2010). [CrossRef]
  7. Y. Yu, J. Dong, X. Li, E. Xu, L. Zhou, and X. Zhang, “All-optical microwave photonic filter based on electrooptic phase modulator and detuned wavelength division de-multiplexer,” IEEE Trans. Microw. Theory Tech.59(9), 2340–2349 (2011). [CrossRef]
  8. E. H. W. Chan and R. A. Minasian, “Reflective amplified recirculating delay line bandpass filter,” J. Lightwave Technol.25(6), 1441–1446 (2007). [CrossRef]
  9. E. M. Xu, X. L. Zhang, L. N. Zhou, Y. Zhang, and D. X. Huang, “Hybrid active-passive microwave photonic filter with high quality factor,” Chin. Phys. Lett.26, 1–4 (2009).
  10. E. H. W. Chan, K. E. Alameh, and R. A. Minasian, “Photonic bandpass filters with high skirt selectivity and stopband attenuation,” J. Lightwave Technol.20(11), 1962–1967 (2002). [CrossRef]
  11. J. Mora, B. Ortega, and J. Capmany, “Accurate control of active recirculating structures for mircrowave photonics signal filtering,” J. Lightwave Technol.26(12), 1626–1631 (2008). [CrossRef]
  12. W. Zhang, J. A. R. Williams, and I. Bennion, “Optical fiber recirculating delay line incorporating a fiber grating array,” IEEE Microw. Compon. Lett.11(5), 217–219 (2001). [CrossRef]
  13. B. Ortega, J. Mora, J. Capmany, D. Pastor, and R. Garcia-Olcina, “Highly selective microwave photonic filters based on active optical recirculating cavity and tuned modulator hybrid structure,” Electron. Lett.41(20), 1133–1135 (2005). [CrossRef]
  14. C. Pulikkaseril, E. H. W. Chan, and R. A. Minasian, “Coherence-free microwave photonic bandpass filter using a frequency-shifting recirculating delay line,” J. Lightwave Technol.28(3), 262–269 (2010). [CrossRef]
  15. K. Fröjdh, “New manufacturing of ultra-long FBG’s (> 10 m) whilst maintaining high performance characteristics,” Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BMA1, (2010).
  16. J. Skaar, L. Wang, and T. Erdogan, “On the synthesis of fiber Bragg gratings by layer peeling,” IEEE J. Quantum Electron.37(2), 165–173 (2001). [CrossRef]
  17. E. H. W. Chan and R. A. Minasian, “Coherence-free high-resolution RF/microwave photonic bandpass filter with high skirt selectivity and high stopband attenuation,” J. Lightwave Technol.28(11), 1646–1651 (2010). [CrossRef]
  18. S. Wakabayashi, A. Baba, A. Itou, and J. Adachi, “Design and fabrication of an apodization profile in linearly chirped fiber Bragg gratings for wideband >35nm and compact tunable dispersion compensator,” J. Opt. Soc. Am. B25(2), 210–217 (2008). [CrossRef]
  19. S. Shimotsu, S. Oikawa, T. Saitou, N. Mitsugi, K. Kubodera, T. Kawanishi, and M. Izutsu, “Single side-band modulation performance of a LiNbO3 integrated modulator consisting of four-phase modulator waveguides,” IEEE Photon. Technol. Lett.13(4), 364–366 (2001). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited