Frequency stabilization method of semiconductor laser, frequency

Details Frequency stabilization method of semiconductor laser, frequency Frequency stabilization method of semiconductor laser, frequency

1994-03-30

1995-02-21

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 35, 372 34, 372 26, 372 38, H01S 313

Patent

active

053923030

ABSTRACT:
A frequency stabilization method of a semiconductor laser is provided. A driving current, a forward voltage and an output light power of the laser mounted on a heat sink is detected. A temperature of the heat sink is also detected. A consumption power of the laser is obtained from the driving current and voltage thus detected, providing a relationship between the output light power and the consumption power. The driving current is controlled so that the output light power is kept constant, and the temperature of the heat sink is controlled based on the relationship so that a temperature of an active layer of the laser is maintained. The output light power is kept constant and at the same time, any temperature change of the active layer is cancelled through the temperature control of the heat sink. Even if the consumption power changes due to an leakage current and/or a recombination current without luminescence to maintain the output light power during long time operation, the temperature of the active layer is maintained by cancelling the consumption power change through the temperature control of the heat sink. Thus, the oscillation frequency of the semiconductor laser can be stabilized at a given value.

REFERENCES:
patent: 4821273 (1989-04-01), Hori et al.
patent: 4847851 (1989-07-01), Dixon
patent: 4908829 (1990-03-01), Kruglii et al.
patent: 5042042 (1991-08-01), Hori et al.
patent: 5181214 (1993-01-01), Berger et al.
patent: 5265115 (1993-11-01), Amano
patent: 5267252 (1993-11-01), Amano
patent: 5287367 (1994-02-01), Yanagawa
By T. Yanagawa et al., "Frequency stabilization of an InGaAsP distributed feedback laser to an NH.sub.3 absorption line a 15137 A with an external frequency modulator", Appl. Phys. Lett., Nov. 15, 1985, vol. 47, No. 10, pp. 1036-1038.
By Y. Chung et al., "Frequency-Locking of 1.5-.mu.m InGaAsP Lasers to an Atomic Krypton Line Without Dithering the Laser Frequency", IEEE Photonics Technology Letters, Jun. 1990, vol. 2, No. 6, pp. 435-437.
By H. Lee et al., "Frequency stabilization of a directly modulated semiconductor laser", Rev. Sci. Instrum., Sep. 1990, vol. 61, No. 9, pp. 2478-2480.
By Y. Sakai et al., "Frequency Stabilization of Laser Diodes Using 1.51-1.55 .mu.m Absorption Lines of .sup.12 C.sub.2 H.sub.2 and .sup.13 C.sub.2 H.sup.2 ", IEEE Journal of Quantum Electronics, Jan. 1992, vol. 28, No. 1, pp. 75-81.
By J. Braasch et al., "Frequency Stabilisation of Monomode Semiconductor Lasers to Birefringent Resonators"Electronic Letters, Apr. 23, 1992, vol. 28, No. 9, pp. 849-851.

Affiliated with

Also associated with

Rating

Frequency stabilization method of semiconductor laser, frequency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency stabilization method of semiconductor laser, frequency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency stabilization method of semiconductor laser, frequency will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1940500