Measurement of wavelength transients in tunable lasers

Details Measurement of wavelength transients in tunable lasers Measurement of wavelength transients in tunable lasers

2007-10-16

2007-10-16

Nguyen, Dung (Michael) T. (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S020000

Reexamination Certificate

active

11034991

ABSTRACT:
A high resolution measurement method and apparatus for tracking wavelength transients in tunable lasers. The apparatus comprises a Mach-Zehnder interferometer (MZI) which is used to generate a self-heterodyne signal between the wavelength transient to be measured, which is effectively the laser signal passed along the time-delayed arm of the MZI, and the laser wavelength after the tuning transient has subsided, which is effectively the same laser signal passed along the direct arm of the MZI. The heterodyne signal is detected on a receiver, and can then be measured with the frequency resolution typical of electronic measurements, such as by means of an oscilloscope. The only laser required is the laser under inspection. The wavelength measurement accuracy is up to twice the laser linewidth, and is only effectively limited by the laser phase noise. The method can be used to implement an automatic frequency control system for tunable lasers.

REFERENCES:
patent: 4859843 (1989-08-01), Baney et al.
patent: 5227857 (1993-07-01), Kersey
E. Buimovich and D. Sadot, “Measurements of thermal frequency chirp in directly modulated DFB lasers and thermal transient induced frequency drift during fast tuning in GCSR lasers using frequency discrimination technique,”Proceedings of LEOS Annual Meeting, Paper TuD7, vol. 1, pp. 208-209, Tucson, Arizona, 2003.
M. Nazrathy et al., “Spectral analysis of optical mixing measurements,”Journal of Lightwave Technology, vol. 7, No. 7, pp. 1083-1096, Jul. 1989.
D. Sadot and I. Elhanany, “Optical switching speed requirements for Terabit/sec packet over WDM networks,”IEEE Photonics Technology Letters, vol. 12, No. 4, pp. 440-442, Apr. 2000.

Affiliated with

Also associated with

Rating

Measurement of wavelength transients in tunable lasers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measurement of wavelength transients in tunable lasers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of wavelength transients in tunable lasers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3893662